-I had a really good weekend at my uncle's.

-________.[ ]

A．Oh, that's very nice of you

B．Congratulations

C．It's a pleasure

D．Oh, I'm glad to hear that

CM＝7所编报的双层高积云，各自都应是基本连续成层的。比如在大片透光高积云下只有孤立的微量荚状高积云时，应按编报云量多的原则，CM编报电码（），而不能编报电码7。

A.3

B.4

C.5