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【单选题】
下列叙述正确的是：A.
P 4 和CO 2 均由共价化合物分子构成
B.
CCl 4 和NH 4 Cl中均存在共价键
C.
Na 2 O和C 60 晶体中都不存在单个小分子
D.
CH 4 分子是平面型分子，NH 3 分子的空间构型为三角锥形
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反馈参考答案：
举一反三
【单选题】Please choose the right answer which reflects the right meaning of the underlined word. University should, adjust the curriculum into a broad and balanced one.
A.
环境
B.
课程表
C.
设备
D.
安排
【单选题】choose the right answer.
A.
Yes, we should.
B.
In the bin.
C.
You are right.
D.
My pleasure.
【简答题】一般检索结果的评价指标是检全率和____。
【单选题】choose the right answer.
A.
That's OK.
B.
Not so good.
C.
That's all right.
D.
Yes, it is.
【单选题】Of the following four statements, choose the right answer
A.
A up, B down, C right, D left
B.
A left,B right, Cup, D down
C.
A front, B back, C left, D right
D.
A left, B right, C back, D front
【单选题】How to choose the right internship according to the writer?
A.
Choose a company which is very well-known.
B.
Choose one which offers good benefits.
C.
Choose one which matches your interests.
【单选题】How to choose the right intership according to the writer?
A.
choose a company which is very well-known
B.
choose one which offers good benifits
C.
choose one which matches your interests
【简答题】Choose the right picture according to each dialogue you hear.
【单选题】在 45 度 /45 度余角透视中,两余点是左、右距点 , 离心点距离相等;两测点离心点距离也相等 , 在心点至距点长度的( )处。
A.
1/2
B.
2/5
C.
1/4
D.
1/8
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