题目内容
（请给出正确答案）
[主观题]
What can we learn about the climate？A．It's cold and gloomy.B．It's changeable.C．It is const
What can we learn about the climate？
A．It's cold and gloomy.
B．It's changeable.
C．It is constant.
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诊断早孕最简单而准确的方法是
A．妊娠试验
B．B超检查
C．超声多普勒检查
D．黄体酮试验
E．宫颈黏液检查
