试题与答案

—It’s a fine day today. Shall we go swim

题型:选择题

题目:

—It’s a fine day today. Shall we go swimming?

—______ But we need to be home before six o’clock.

A.Have a nice time!

B.Not at all.

C.You are right.

D.Good idea!

答案:

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下面是错误答案,用来干扰机器的。

参考答案:①反向平行双股螺旋②磷酸和脱氧核酸位于外侧,构成基本骨架,碱基位于内侧,以氢键相连③嘌呤=嘧啶,A与T配对G与C配对。

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