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What properties allow plastics compete strongly with optical glasses? A) Better wear & abrasion

What properties allow plastics compete strongly with optical glasses?

A) Better wear & abrasion resistance

B) Better toughness

C) Low cost

D) Low density

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更多“What properties allow plastics…”相关的问题
第1题
Which properties rank highest in importance when selecting materials for many applications? What tes
ts can provide the most useful information on such properties for material selection?
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第2题
But although affiliative behavior. shares some of the properties associated with biolo
gical drives, I doubt whether our desire to make friends is really much influenced by adaptive considerations.By “biological drives” the author means (Befriending) ()。

A.biological energy

B.the animal instincts which spur us to do what we do

C.something which drives us together

D.our human desire which drives us together

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第3题
1966年,美国麻省理工学院AI实验室开发的()聊天机器人实现了计算机与人通过文本来交流。

A.苹果Siri

B.谷歌Allo

C.微软小冰

D.ELIZA

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第4题
Magnesium is another mineral we now obtain by collecting huge volumes of ocean water and t
reating it with chemicals. Although originally it was derived only from brines or from the treatment of such magnesium-containing rocks as dolomite, of which whole mountain ranges are composed. In a cubic mile of sea water there are about four million tons of magnesium. Since the direct extraction method was developed about 1941, production has increased enormously. It was magnesium from sea that made possible the wartime growth of the aviation industry, for every, air plane made in the United States (and in most other countries as well) contains about haft a ton of magnesium metal. And it has innumerable uses in other industries where a lightweight metal is desired, besides its long-standing utility as an insulating material, and its use in printing inks, medicines, and toothpaste.

What is the main topic of this passage?

A.Use of sea water.

B.Treatment of sea water.

C.Chemical properties of magnesium.

D.Derivation and users of magnesium.

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第5题
听力原文:JANICE: Hello... Flagstone.JON: Oh hello; is that Flagstone Properties?JANICE: Ye

听力原文:JANICE: Hello... Flagstone.

JON: Oh hello; is that Flagstone Properties?

JANICE: Yes that's right. Flagstone here. How can I help you? 【Example】

JON: Hello. I'm ringing just to make enquiries about renting a house. My name's Jon Anderson.

JANICE: Yes, Mr Anderson. What sort of thing were you looking for?

JON: Two-bedroomed house with garden.

JANICE: Well... yes, sir, that shouldn't be any problem... just to let you know that our

main areas, the main areas we deal with, are the city centre itself... 【Q1】

JOS: City centre.., uh-huh.

JANICE: And the north suburbs.

JON: Oh well.., we were most interested in the Northern areas actually.

JANICE: Right... yes... What sort of price were you thinking of?

JON: Well... could you give me some idea?

JANICE: Certainly. It really ranges from £250 per month. 【Q2】

JON: Only £250?

JANICE: Yes, to about £500 depending on a number of different factors.

JON: What does it depend on?

JANICE: Well, obviously the quality of the area. And then whether there's a garden. 【Q3】

JON: Well, as I said, we'd want a garden.

JANICE: And a garage pushes up the price.

JON: Right... well, we wouldn't necessarily need one. I think about £350 a month would be our limit.

JANICE: OK. Well... would you like to have a look at a couple of properties, sir?

JON: Yes, that'd be great.

JANICE: Looking at our files... I think we've got two which might suit you...

JON: Hang on. I'll just get a pen. Right.

JANICE: OK. Well, there's one on West Park Road which is £325 a month. 【Q4】

JON: Are the bills included?

JANICE: Well, that one just includes the water bill. 【Q5】

JON: OK, right.

JANICE: And the second house is in Tithe Road. I'll just spell that for you... OK?

JON: Yep.

JANICE: T-I-T-H-E Road.

JON: Got that. And how much is that one?

JANICE: That's £380.

JON: 380. IS that including water?

JANICE: NO, I'm afraid not, but it does include the telephone rental. 【Q6】

JON: Oh well, that's not too bad then. So ....

JANICE: So, when would you be available to see them?

JON: Well, I'll be in town next week.., say... Thursday?

JANICE: NO, I'm sorry we don't have any availability for Thursday. How about

Wednesday afternoon? 【Q7】

JON: OK. That's fine. Would 5.00 be OK?

JANICE: Yes, fine. 5.00 it is. Just come to the Flagstone Offices.

JON: Oh, before I forget. What sort of things do I need to get done.., to rent with you?

JANICE: Well, the most important thing is a letter from your bank...

JON: No problem...

JANICE: And then a reference letter from your employer. 【Q8】

JON: Yes, that's OK.

JANICE: Great, and then we would need you to give 2 weeks' notice of moving in... 【Q9】

JON: Right... 2 weeks' notice. And what about a deposit? 【Q10】

JANICE: That's one month's rent, whatever the amount is.

JON: OK. One month. Is that it?

JANICE: No, sorry, one more.., you will have to pay for the contract.

JON: Oh yes. I'd forgotten about that. OK, fine. So I'll start arranging those, and I'll...

JANICE: ... I'll see you next week.

JON: Yes. Thanks very much. Bye.

JANICE: Goodbye.

SECTION 1 Questions 1-10

Complete the notes below.

Areas dealt with: 【1】

north suburbs

Rent: from 【2】 £ ______ to £______ a month

Dependes on: the area

availability of 【3】

garage

Properties available: West Park Road

rent 【4】 £ ______ a month

including 【5】

Tithe Road

rent £380 a month

including 【6】 rental

Viewing arrangements: meet at office on 【7】 at 5.00 pm

Need: letter from bank

reference from 【8】

Must: give 【9】 notice of moving in

give deposit of 【10】

pay for contract

【1】

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第6题
Starting with his review of Skinner's Verbal Behavior, Noam Chomsky had led the psycholing
uists who argue that man has developed an innate(天生的) capacity for dealing with the linguistic universals common to all languages. Experience and learning then provide only information about the (1)_____ instances of those universal aspects of language which are needed to communicate with other people within a particular language (2)_____.

This linguistic approach (3)_____ the view that language is built upon learned associations between words. What is learned is not strings of words per se(本身), but (4)_____ rules that enable a speaker to (5)_____ an infinite variety of novel sentences. (6)_____ single words are learned as concepts: they do not stand in a one-to-one (7)_____ with the particular thing signified, but (8)_____ all members of a general class.

This view of the innate aspect of language learning is at first not readily (9)_____ into existing psychological frameworks and (10)_____ a challenge that has stimulated much thought and new research directions. Chomsky argues that a precondition for language development is the existence of certain principles "intrinsic(原有的) to the mind" that provide invariant structures (11)_____ perceiving, learning and thinking. Language (12)_____ all of these processes; thus its study (13)_____ our theories of knowledge in general.

Basic to this model of language is the notion that a child's learning of language is a kind of theory (14)_____. It's thought to be accomplished (15)_____ explicit instruction, (16)_____ of intelligence level, at an early age when he is not capable of other complex (17)_____ or motor achievements, and with relatively little reliable data to go on. (18)_____, the child constructs a theory of an ideal language which has broad (19)_____ power. Chomsky argues that all children could not develop the same basic theory (20)_____ it not for the innate existence of properties of mental organization which limit the possible properties of languages.

A.special

B.specific

C.definite

D.explicit

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第7题
The empty house, in a middle-class corner of southern California, is two storeys high and
boasts a three-car garage. Roses bloom around a kidney-shaped swimming pool, which is green with algae. Bill Bobbitt, a county inspector, dips a ladle into the water and brings up half a dozen wriggling larvae. Mosquitoes, and the West Nile virus that some of them carry, are thriving in California's plunging property market.

West Nile virus arrived in America in 1999 and made it to California three years later. Since then it is known to have infected 2,300 people in the state, of whom 76 have died. In Orange County this is the worst summer yet. By this point last year officials there had discovered nine birds that had been killed by West Nile virus and not one infected mosquito. So far this year they have found 219 infected birds and 75 infected mosquitoes.

Some of this rise is due to better testing and co-operation with the animal services department, which receives most reports of dying birds. But a much bigger cause is the housing crunch. Fully 63,000 homes were foreclosed in California between April and June, according to DataQuick, a property data services outfit. In the past year the number of Orange County homeowners who have defaulted on their mortgages has more than doubled. Empty houses mean untended pools. Untended pools quickly breed mosquitoes.

Dead birds are also piling up in neighbouring counties like Los Angeles, San Diego and San Bernardino, which also have high foreclosure rates. Last week 170 infected mosquitoes were discovered in the state as a whole-the highest tally ever. So far this year i3 human infections have been reported in California, but the numbers are expected to grow rapidly as the summer moves on. John Rusmisel, president-elect of the board responsible for killing the critters, says a peak in infected mosquitoes is generally followed, two or three weeks later, by a peak in human cases.

In theory, owners are supposed to keep their properties in decent shape whether they live there or not. California has even passed a bill fining banks and mortgage companies that seize properties and then allow pools to fester. But Mr Bobbitt isn't waiting for the lawyers. He has treated the pool in Santa Ana with oil and synthetic growth hormones, which will keep the mosquitoes adolescent, preventing breeding. Then he tips in a few dozen mosquito fish (Gambusia affinis), which begin happily launching larvae. You can buy a lot of the fish for what a lawyer charges per hour, and some authorities, with commendable creativity, even provide them free to help control the pests.

According to the text, what is the main reason of quick breed of mosquitoes?

A.House crunch.

B.Inadequate caring of the houses.

C.Warm and humid weather.

D.More reports of dying birds occur in California.

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第8题
You will have no difficulty in making contact with the Agent. As you enter his office, you
will be greeted immediately and politely asked what you are looking for. The Estate Agent's Negotiator (房地产推销员) —as he is called—will probably check that you really know your financial position. No harm in that, but you can always tell him that you have confirmed the position with the XYZ Building Society. He will accept that.

He will show you the details of a whole range of properties; many of them are not really what you are looking for at all. That does not matter. Far better turn them down than risk missing the right one.

The printed details he will give you are called " particulars". Over the years, a whole language has grown up, solely for use in Agent's particulars. It is flowery, ornate (华丽的) and, providing you read it carefully and discount the adjectives, it can be very accurate and helpful.

Since the passing of the Trades Description Act, any trader trying to sell something has had to be very careful as to what they say about it. Estate Agents have, by now, become very competent at going as far as they dare. For instance, it is quite acceptable to say "delightfully situated". That is an expression of his opinion. You may not agree, but he might like the idea of living next to the gasworks. If, on the other hand, he says that the house has five bedrooms when, in fact, it has only two, that is a misstatement of fact and is an offence. This has made Estate Agents, and others for that matter, rather more careful.

Basically, all that you need to know about a house is: how many bedrooms it has; an indication of their size; whether the house has a garage; whether there is a garden and whether it is at the back or the front of the house; whether it is semi-detached or terraced (联排的) .

The Estate Agent's Negotiator will______.

A.want all the details of your financial circumstances

B.want to satisfy himself that you understand the financial implications of buying a house

C.check your financial position with the XYZ Building Society

D.accept any statement you make about your financial position

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第9题
GSMcurrentchannel窗口内的字段修改步骤是()。

A.右键‐‐Properties‐‐Cellcontent

B.右键‐‐Cellcontent‐‐Properties

C.Properties‐‐右键‐‐Cellcontent

D.Cellcontent‐‐右键‐‐Properties

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第10题
properties是一个配置属性的元素.MyBatis框架中提供了3中配置方式,下列哪种不是properties的配置方式()

A.properties子元素

B.引入外部文件

C.properties配置文件

D.程序参数传递

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