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问题 选择题

设NA为阿伏加德罗常数，下列说法正确的是    （  ）

A．常温常压，28g氮气与乙烯具有相同的分子数

B．标准状况下，11.2L臭氧中含有的氧原子数为3NA

C．0.1 mol.L-1醋酸钠溶液中阴离子总数约为0.2NA

D．56g Fe与足量的浓盐酸反应转移的电子数为3NA

答案

答案：A

填空题
用方框内的词的适当形式填空。
must, both, all, quiet, young, nothing, anything, long, dance, well, from
       I have a twin sister, Lily. She has   1   hair than me. Many people think we   2   have lots of things in
common. I'm afraid it is not true. When rny parents' friends come to our home, Lily often sits there and says   3   , but I like to have a good chat with them. So she is   4   than me. Lily likes reading, drawing,   5   ,
cooking and so on: Ijust like playing basketball. She has more hobbies than me, but she is not as athletic as me. Because Lily does   6   than me in the study, my parents often say to me," You should learn   7   your
  8  . sister."As the twins, of course we have some similarities(相似之处). For example, we   9   like eating fast food, going shopping and listening to some pop music.
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单项选择题

脑血栓形成患者应用溶栓疗法的药物是（）。

A.尿激酶

B.肝素

C.双香豆素

D.华法令

E.阿斯匹林
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