根据对药物溶解度和释放模式的不同需求，可以把胶囊剂制备成（）。 A.硬胶囊 B.软胶

What makes online shopping so popular is      it shortens the distance between manufacturers and consumers．

A．how

B．that

C．whether

D．why

罐壁通气孔的环向间距应小于（）m。

A.20

B.18

C.15

D.10

  ------Where did you first meet your boyfriend?

------It was in the department store ______ he worked.

A．which

B．that

C．what

D．where

结肠梗阻最常见的原因是（）。

A.肠蛔虫病

B.肠穿孔

C.肠粘连

D.嵌顿疝

E.结肠肿瘤

《灵枢·顺气一日分为四时》说疾病病情随昼夜时间节律而变化，其病“安”的时间是

A．旦
B．昼
C．前夜
D．夕
E．后夜