选择相应的答句。

( )1. Is there a window?

(     )2. Is it a cat?

( )3. Good morning!

(     )4. Where's my shirt?

(     )5. What's in your box?

A. A ball.

B. Yes, it is.

C. No, there isn't.

D. It's on the bed.

E. Good morning!

关于胃腺，以下哪项不正确（）

A.主细胞分泌胃蛋白酶原

B.壁细胞分泌盐酸

C.G细胞分泌胃泌素

D.颈黏液细胞分泌黏液

E.主细胞分泌内因子