正确答案: C

三峡水库处于蓄清期

题目：当地球在甲位置时（ ）。

解析：C

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学习资料的答案和解析：

[单选题]What does the author expect to show by Jeff’s story ？

One should realize the wrong in his bad deeds.

[单选题]

sighed

[单选题]Professor Williams keeps telling his students that the future______to the well-educated.

belongs B． is belonged

[单选题]制剂生产控制区的洁净度要求为（ ）。

十万级

[单选题]What is talk mainly about?

The plan for the day.

[单选题]花粉母细胞经过连续两次有丝分裂，可产生4个小孢子。( )

正确