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【单选题】
设某完全无有 n 个顶点,则该完全无有( )条边A.
n(n-1)/2
B.
n(n-1)
C.
n 2
D.
n 2 -1
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【单选题】根据《关于进一步促进旅游投资和消费的若干意见》,到2020年,鼓励引导社会资本建设自驾车房车营地()个左右
A.
500
B.
1000
C.
5000
D.
10000
【单选题】—Look! A book is on the floor. Whose is it? —It be Rick’s. It has his name on it.
A.
mustn’t
B.
can’t
C.
must
D.
need
【简答题】There seems to be an electrical problem. I’ll get someone to ____it. A) look at B) look into C) look upon D) look out
【单选题】—Look! It be the new woman manager. —It be her. She has just left for shanghai. [ ]
A.
can ; mustn't
B.
must ; can't
C.
must ; mustn't
D.
can't ; must
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