人生命周期的起点是____ 。
A (n) is a group of words whose meaning is different from the meaning of each word understood on its own.
下面四幅图表示的热力环流中，错误的是（ ）
时间min
…
6
7
8
9
10
11
12
13
14
15
温度（℃）
95
96
97
98
____
