单选题：For all its extremes，Venus is a(n) incalculable laboratory f

题目内容：

For all its extremes，Venus is a(n) incalculable laboratory for researchers studying theweather and climate of earth．

参考答案：

答案解析：

The WTO meeting __________ with no agreement on launching a

The WTO meeting __________ with no agreement on launching a broad round of trade

分类：2级题型：单选题

The American basketball team announced that they would not__________first place

分类：2级题型：单选题

分类：2级题型：单选题

甲(男，22周岁)，为达到和乙(女，19周岁)结婚的目的，故意隐瞒乙的真实年龄而办理了结婚登记。两年后，因甲、乙经常吵架，乙以办理结婚登记时未达到法定婚龄为由向

分类：2级题型：单选题

分类：2级题型：单选题