The boys and girls follow Yao Ming all the time.

A．go after

B．go in for

C．look after

D．look for

酶原颗粒主要见于（）

A.浆液性腺泡细胞

B.黏液性腺泡细胞

C.肌上皮细胞

D.闰管细胞

E.分泌管细胞