问题
单项选择题
()是积雨云进入成熟期的标志。
A.积雨云顶部砧状云的出现
B.云体快速增长
C.云体内为一致的高速上升气流
D.云顶高度在6000以下
答案
参考答案:A
()是积雨云进入成熟期的标志。
A.积雨云顶部砧状云的出现
B.云体快速增长
C.云体内为一致的高速上升气流
D.云顶高度在6000以下
参考答案:A
A. three B. four C, five 小题2:Why is the post office closed on November 25? A. Because it's a holiday. B. Because it's a weekend. C. Because it' s Sunday. 小题3:If Mr. Black wants to send a letter at 8: 30 a.m., he can go to the post office on . A. Sunday, November 28 B. Saturday, November 27 C. Friday, November 26 |