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【单选题】
设N A 表示加德罗常数，下列说法正确的是： [ ]A.
标准状况下，5.6L氧气含有n个O 2 ，则N A 为4n
B.
常温常压下，1mol氦气含有的原子数为2N A
C.
常温下，1mol氯气与足量的烧碱反应，转移的电子数为2 N A
D.
18克水中所含的电子数为8 N A
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【简答题】Mr.Scott hasn’t got a telephone in his new garage because ______.A. It isn't far from his ole garage, so he doesn't need one B. He has twelve pigeons C. He can't get one D. It's too expensive
【单选题】Mr. Scott hasn’t got a telephone in his new garage because _______.
A.
it isn’t far from his old garage, so he doesn’t need one
B.
he has twelve pigeons
C.
he can’t get one
D.
It’s too expensive
【简答题】下面是两封Celia写给她的老师Mr. Scott的信以及Mr. Scott给她的回信。 Dear Mr. Scott, I’m writing to complain about my deskmate, Lana. She likes junk food (垃圾食品) and she always brings some to school. After she eats it, ...
【简答题】阅读理解。 下面两封是Celia写给她的老师Mr. Scott的信以及Mr. Scott给她的回信。 Dear Mr. Scott, I'm writing to complain about my deskmate, Lana. She likes junk food (垃圾食品) and she always brings some to school. After she eats it, ...
【单选题】Mr. Scott hasn’t got a telephone in his new garage because _______ .
A.
it isn’t far from his old garage, so he doesn’t need one
B.
he has twelve pigeons
C.
he can’t get one
D.
it’s too expensive
【单选题】Peter thought Mr. Grant decided to change with the times owing to the help of
A.
Mr. Scott, the consultant.
B.
Mr. Martin, the sales manager.
C.
Joanna, the advertising manager.
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