题目内容
（请给出正确答案）
A.People do not read as much as before
B.People are tired of the old reading materials
C.People have more choices in reading
D.People do not have enough time to read
如果结果不匹配，请 联系老师 获取答案
更多“Passage 2 第20题（）”相关的问题
根据以下材料回答第 1～5 题：
A．I will take it．
B．How much is it？
C．What can I do for you？
D．Which one do you like？
E．Let me help you．
F．How many ones do you want？
G．Here you are．
H．Thank you SO much!
(S=Shopkeeper。P＝Peter)
第 55 题
S： 1
P：1 wan to buy a notebook．
S：The notebooks are over there． 2
P：The blue one looks nice． 3
S：Two yuan．
P：That’s all right． 4
S： 5
P：Thank you．
A.（1）提前出现的房性P'波，其形态与窦性P波不同
B.（2）P'-R间期≥0.12s
C.（3）房性P'波后的QRS波群形态正常
D.（4）有不完全性代偿间歇：即房性期前收缩前、后的2个窦性P波的时距小于窦性P-P间距的2倍
A.（1）提前出现的QRS-T波群，其前无提早出现的异位P'波
B.（2）QRS波群宽大畸形，时间≥0.12s
C.（3）继发性ST-T改变
D.（4）有完全性代偿间歇：即室性期前收缩前、后的2个窦性P波时距等于窦性P-P间距的2倍
A.0万元
B.1054.89万元
C.3000万元
D.28945万元
A.50种，3 次，20%/30%/50% 保额，同一种疾病只赔付一次
B.55种，3 次，20%/30%/50% 保额，同一种疾病只赔付一次
C.55种，2次，20%/30% 保额，同一种疾病只赔付一次
D.55种，3 次，20%/30%/50% 保额，同一种疾病可赔付多次
A.（1）P波消失，代之以间距匀齐、波形一致、连续呈锯齿状的房扑波（F波），F波间无等电位线，其频率为250～350次/min，在Ⅱ、Ⅲ、aVF导联上明显
B.（2）心室率随不同的房室传导比例（常为2:1或4:1）而定。心室律可规则，也可不规则，此与房室传导比例的固定与否有关
C.（3）QRS波群形态、时间正常，有时可因室内差异性传导而使QRS波群增宽、畸形
Passage 2 Questions 6 to 10 are based on the following passage:
How men first learned to invent words is unknown; in other words, the origin of language is a mystery. All we really know is that men, unlike animals, somehow invented certain sounds to express thoughts and feelings, actions and things, so that they could communicate with each other; and that later they agreed upon certain signs, called letters, which could be combined to represent those sounds, and which could be written down. Those sounds, whether spoken, or written in letters we call words.
The power of words, then, lies in their combinations — the things they bring up before our minds. Words become filled with meaning for us by experience; and the longer we live, the more certain words recall to us the glad and sad events of our past; and the more we read and learn, the more the number of words that mean something to us increases.
Great writers are those who not only have great thoughts but also express these thoughts in words which appeal powerfully to our minds and feelings. This charming and telling use of words is what we call literary (文字的) style. Above all, the real poet is a master of words. He can convey his meaning in words which sing like music, and which by their position and association can move men to tears. We should therefore learn to choose our words carefully and use them accurately, or they will make our speech silly and rude.
第6题：The origin of language ________.
A. is reflected in sounds and letters B. is handed down from generation to generation C. dates back to the prehistoric period D. is a problem not yet solved
某滚齿机变速箱第Ⅱ轴为根径d=36mm的花键轴。传递功率P=3.2kW，转速n=315r/min。轴上齿轮1为直齿圆柱齿轮，节圆直径d1=108mm。传动力分解为周向力F1和径向力Fr1，且Fr1=F1tan20°。齿轮2为螺旋角β=17°20'的斜齿轮，节圆直径d2=141mm。传动力分解为周向力F2、径向力Fr2和轴向力Fa2，且
