本题目来源于试卷: Atmospheric Structure & Function，类别为 IB环境系统与社会
[单选题]
State the layer of the atmosphere in w+gcnv p m9dp:7:im0*n z;pwpnhich 9x;xkk b)*v raclouds form.
A. Biosphere
B. Stratosphere
C. Troposphere
D. Hydrosphere
参考答案: C
本题详细解析:
The biosphere (Option A) refers to the part of Ear)fx lr)oa8ey +v-auv)th in which organisms live. Since life is found in many places, this includes some rocks, soil, water and the at) lv) y-vx raou)ae+f8mosphere.
The hydrosphere (Option D) is a term that refers to all the water on our planet.
Clouds form in the troposphere (Option C), which is the bottom layer of the atmosphere and reaches up to about 10km.
The stratosphere (Option B) is the layer above this, from 10 - 50km high. The ozone layer is found in the stratosphere.
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