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How many methods can be used for fixing the shipment date？

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更多“How many methods can be used f…”相关的问题

第1题

It is difficult to see how any student of general physics can gain real insight into the material an

d methods of physics without some experience in the laboratory.

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第2题

How many types can the packing be classified into？

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第3题

How many cakes can I take.()

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第4题

如何表达你有多少个球（）

A.How many balls can you see

B.How many balls do you see

C.How many balls do you have

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第5题

Two techniques have recently been developed to simplify research and reduce the number of

nonhuman primates needed in studies of certain complex hormonal reactions. One technique involves the culturing of primate pituitary cells and the cells of certain human turnouts. In the other, animal oviduct tissue is transplanted under the skin of laboratory primates. Both culturing techniques complement existing methods of studying intact animals.

With an in vitro culturing technique, researchers are deciphering how biochemical agents regulate the secretion of prolactin, the pituitary hormone that promotes milk production. The cultured cells survive for as long as a month, and they do not require serum, a commonly used culture ingredient that can influence cellular function and confound study results. One primate pituitary gland may yield enough cells for as many as 72 culture dishes, which otherwise would require as many animals.

The other technique allows scientists to monitor cellular differentiation in the reproductive tracts of female monkeys. While falling short of the long-sought goal of developing an in vitro model of the female reproductive system, the next-best alternative was achieved. The method involves transplanting oviduct tissue to an easily accessible site under the skin, where the grafted cells behave exactly as if they were in their normal environment. In about 80 percent of the grafts, blood vessels in surrounding abdominal skin grow into and begin nourishing the oviduct tissue. Otherwise, the tissue is largely isolated, walled off by the surrounding skin. A cyst forms that shrinks and swells in tandem with stages of the menstrual cycle. With about 80 percent of the grafts re-establishing themselves in the new site, a single monkey may bear as many as 20 miniature oviducts that are easily accessible for study. Because samples are removed with a simple procedure requiring only local anaesthesia, scientists can track changes in oviduct cells over short intervals. In contrast, repeated analysis of cellular changes within the oviduct itself would require abdominal surgery every time a sample was taken--a procedure that the animals could not tolerate.

Scientists are using the grafting technique to study chlamydia infections, a leading cause of infertility among women. By infecting oviduct tissues transplanted into the abdominal skin of rhesus monkeys, researchers hope to determine how the bacteria cause pelvic inflammatory disease and lesions that obstruct the oviduct. Such research could eventually lead to the development of antibodies to the infectious agent and a strategy for producing a chlamydia vaccine.

This passage deals primarily with ______.

A．reproductive organs of nonhuman primates

B．diseases of the pituitary glands

C．in vitro studies of pituitary hormones

D．techniques for studying hormonal reactions

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第6题

你想问："你看见了多少条鱼"时，应这样说（）

A.How many fish do you have

B.How many fish can you see

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第7题

回答下列各题： The Importance of Good Communications Effective communication is essent

ial for all organizations. It links the activities of the various parts of the organization and ensures that everyone is working towards a common goal. It is also extremely important for motivating employees. Staff need to know how they are getting on, what they are doing right and in which areas they could improve. Working alone can be extremely difficult and it is much easier if someone takes an interest and provides support. Employees need to understand why their job is important and how it contributes to the overall success of the firm. Personal communication should also include target setting. People usually respond well to goals, provided these are agreed between the manager and subordinate and not imposed. However, firms often have communication problems that can undermine their performance. In many cases,these problems occur because messages are passed on in an inappropriate way. There are, of course, several ways of conveying information to others in the organization which include speaking to them directly, e-mailing, telephoning or sending a memo. The most appropriate method depends on what exactly it is you are communicating. For example, anything that is particularly sensitive or confidential, such as an employees appraisal, should be done face-to-face. One of the main problems for senior executives is that they do not have the time or resources needed to communicate effectively. In large companies, for example, it is impossible for senior managers to meet and discuss progress with each employee individually. Obviously this task can be delegated but at the cost of creating a gap between senior management and staff. As a result, managers are often forced to use other methods of communication, like memos or notes, even if they know these are not necessarily the most suitable means of passing on messages. The use of technology, such as e-mail, mobile phones and network systems, is speeding up communication immensely. However, this does not mean that more investment in technology automatically proves beneficial: systems can become outdated or employees may lack appropriate training. There are many communications tools now available but a firm cannot afford all of them. Even if it could, it does not actually need them all.The potential gains must be weighed up against the costs, and firms should realize that more communicationdoes not necessarily mean better communication." As the number of people involved in an organization increase, the use of written communication rises even faster. Instead of a quick conversation to sort something out numerous messages can be passed backwards and forwards. This can lead to a tremendous amount of paperwork and is often less effective than face-to-face communication. When you are actually talking to someone you can discuss things until you are happy that they have understood and feedback is immediate. With written messages, however, you are never quite sure how it will be received what you think you have said and what the other person thinks you have said can be very different. The amount of written information generated in large organizations today can lead to communication overload. So much information is gathered that it gets in the way of making decisions. Take a look at the average managers desk and you will see the problem -- it is often covered with letters, reports and memos. This overload can lead to inefficiencies. For example, managers may not be able to find the information they want when they need it. Communication is also becoming more difficult with the changes occurring in employment patterns. With more people working part-time and working at home, managing communication is becoming increasingly complex. In the first paragraph the writer recommends that communication with staff should include

A.some feedback on their job performance.

B.an explanation of how company targets have been set.

C.information on promotion prospects within the company.

D.an indication of which duties they can expect assistance with.

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第8题

请阅读Passage l。完成第小题。 Teaching children to read well from the start is the most impo

请阅读Passage l。完成第小题。

Teaching children to read well from the start is the most important task of elementary schools. But relying on educators to approach this task correctly can be a great mistake. Many schools continue to employ instructional methods that have been proven ineffective. The staying power of the "look-say" or "whole-word" method of teaching beginning reading is perhaps the most flagrant example of this failure to instruct effectively.

The whole-word approach to reading stresses the meaning of words over the meaning of letters， thinking over decoding， developing a sight vocabulary of familiar words over developing the ability to unlock the pronunciation of unfamiliar words. It fits in with the self-directed，"learning how to learn" activities recommended by advocates of "open" classrooms and with the concept that children have to be developmentally ready to begin reading. Before 1963， no major publisher put out anything but these "Run-Spot-Run" readers.

However， in 1955， Rudolf Flesch touched off what has been called "the great debate" in beginning reading. In his best-seller Why Johnny Can"t Read， Flesch indicted the nation"s public schools for miseducating students by using the look-say method. He said——and more scholarly studies by Jeane Chall and Rovert Dykstra later confirmed——that another approach to beginning reading， founded on phonics， is far superior.

Systematic phonics first teaches children to associate letters and letter combinations with

sounds; it then teaches them how to blend these sounds together to make words. Rather than building up a relatively limited vocabulary of memorized words， it imparts a code by which the pronunciations of the vast majority of the most common words in the English language can be learned. Phonics does not devalue the importance of thinking about the meaning of words and sentences; it simply recognizes that decoding is the logical and necessary first step.

The author feels that counting on educators to teach reading correctly is_________. 查看材料

A. only logical and natural

B. the expected position

C. probably a mistake

D. merely effective instruction

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第9题

How many volts of electricity can an electric eel emit？A．1,000.B．800.C．200.D．120.

How many volts of electricity can an electric eel emit？

A．1,000.

B．800.

C．200.