关于“瓦肆“（也称”瓦子“）的说法，不正确的是（     ）

给下列句子编号。

Kate:  Look, Mary! A girl is over there. Can you see her?

Mary:  Which girl?

Kate:  The one in the red coat under the apple tree. Do you know her?

Mary:  That's Lily. Lily, how are you?

Lily:   Very well, thank you, and you?

Mary:  I'm fine too. This is my friend, Kate.

Lily:   Nice to meet you, Kate.

Kate:  Nice to meet you too.

A. That's Lily. Lily, how are you?

B. Which girl?

C. Look, Mary! A girl is over there. Can you see her?

D .The one in the red coat under the apple tree. Do you know her?

E. Very well, thank you, and you?

F. Nice to meet you, Kate.

G. I'm fine too. This is my friend, Kate.

H. Nice to meet you too.

____

正三棱柱$ABC-A_1{B}_1{C}_{}$中，$AB=A{A}_1$则$A{C}_1$与平面$B{B}_1{C}_{1}C$所成角的正弦值为（   ）

动物对于一个生态系统来说是很重要的，这是因为（    ）