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【单选题】
主量子数n=4时,原子核外在该层的原子轨道数为 个。A.
4
B.
7
C.
9
D.
16
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举一反三
【单选题】According to what we read in this chapter, how many phases are there in Shakepeare's writing life?
A.
1
B.
2
C.
3
D.
4
【单选题】How do we react to so many attractive commercials according to Unit 5?
A.
It is impossible to resist these commercials.
B.
Just buy everything we want.
C.
We are always attracted by these goods in the commercials.
D.
Facing plenty of commercials,we should think carefully whether we need this stuff.
【单选题】According to the passage, we know that
A.
although Sony did not fire employees, many U. S. workers quit within one year
B.
Sony employers are good at motivating their U. S. employees
C.
Sony has strict rules against workers joining the union
D.
compared with Japanese workers, American workers are more difficult to manage
【简答题】U1A 、 U2 及外围元件构成可控的 振荡器。 U1A 为 器。
【简答题】How many ways do we have to make powdered coffee according to the passage?____________
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