题目内容

Chaoshu is very obstinate,_______idea you put forward, he always finds reasons to object to it.

A.What
B.However
C.Whatever
D.Whichever

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不透气透水,对内部组织有保护作用是()细胞壁。

A.木质化
B.木栓化
C.角质化
D.粘液质化

-How is your recent trip to Taiyuan?--I’ve never had____one before.

A.the most pleasant
B.a least pleasant
C.a pleasant
D.a more pleasant

_____the production cost is high,we think that our price was not on the high side.

A.Consider
B.Considering
C.Considered
D.Considerable

下列哪个不是Lac操纵子的组成部分()。

A.Z.Y、A基因
B.启动序列
C.操纵序列
D.TATA盒
E.CAP结合位点

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