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【单选题】
用N A 表示加德罗常数，下列叙述正确的是 [ ]A.
64 g SO 2 含有氧原子数为N A
B.
物质的量浓度为0.5 mol·L -1 的MgCl 2 溶液，含有Cl - 数为N A
C.
标准状况下，22.4 L H 2 O的分子数为N A
D.
常温常压下，14 g N 2 含有分子数为0.5N A
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举一反三
【单选题】(2017.23)If you fight hard , k now who you are , and are proud of who you are , you've got a good of winning .
A.
choice
B.
chance
C.
decision
D.
direction
【单选题】The best title for the passage is ______.
A.
Vitamin E Scores for Old People
B.
Vitamin E Fights Cancer
C.
You Need Vitamin E
D.
How to Keep Healthy
【单选题】Traffic with criminals is dangerous.
A.
dealing with criminals
B.
tracking the criminals
C.
fighting the criminals
D.
transporting criminals
【简答题】A．The residents. B．The passers. C．The soldiers. D．The police.
【单选题】For a teacher to facilitate learning effectively in the classroom, he or she must...Which of the following is one of the main roles of the teacher?
A.
Concentrate on teaching to the advantage of the brightest pupils in the classroom .
B.
Do all the talking in the classroom .
C.
Apply strict procedures outlined in his/her teaching/lesson plan.
D.
Have a clear knowledge of who his/her learners are.
【单选题】He outlined his plan and then_______ to explain them in more detail.
A.
went
B.
proceeded
C.
kept
D.
progressed
【单选题】Sometimes, kids have extra challenges making friends, even if you're doing everything fight as a parent. All children are capable of having friends, although high self-esteem really helps them succeed...
A.
Cards.
B.
Children.
C.
Children's feelings.
D.
Children's friends.
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