单项选择题

被称为“Newman投影式”的化合物是 A.
  B.
  C.
  D.

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单项选择题
3阶完全无向图的不同构的生成子图有( )
A．2
B．3
C．4
D．5
多项选择题
When talking about personal strengths, the interviewers may use the following sentence patterns : __________. A、Please give a general introduction about your personal strengths. B、can you say something about your strong points? C、What are your advantages for this job? D、What do you consider your greatest strengths?
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