大气压强跟天气和高度有密切的关系.如果人因天气感到闷热时,气压____ (填高或低),这时的天气可能是____ ;在高山上要煮熟饭,要用密闭的高压锅,如图,这是因为____ 。
一 Could you tell me ? I must find him.
一Sorry, I'v no idea. But he was here just now.
如图,三视图描述的实物形状是( )
根据题意,补全对话。
— Are the vegetables healthy?
—____ .(做肯定回答)
明代万历皇帝的定陵墓室结构为( )
HI体积分数
1min
2min
3min
4min
5min
6min
7min
条件I
26%
42%
52%
57%
60%
条件II
20%
33%
43%
65%