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【单选题】
某分部工程分四个施工段,其流水节拍如下:A过程:3天、2天、1天、4天; B过程:2天、3天、2天、3天;C过程:1天、3天、2天、3天; D过程:2天、4天、3天、1天。则K(A,B)、K(B,C)、K(C,D)分别为( )天。A.
3、4、3
B.
3、2、3
C.
2、4、3
D.
3、4、2
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【单选题】Some people are against killing wolves because ．
A.
wolves help to keep the ecological balance in the wildemess
B.
there is too small a wolf population in the wilderness
C.
there are too many deer in the wilderness
D.
wolves are afraid of people and never attack people
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A.
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B.
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C.
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【单选题】Too many deer ________ and they will disappear in the near future.
A.
are being killed
B.
killed
C.
is being killed
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are killed
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