钻井液静止（）后所测的切力称为终切力。

I know I didn’t forget ________ my camera with me because I clearly remember ________ it in my bag.

A．taking; to put

B．to take; to put

C．to have taken; putting

D．to take; putting

It is usually warm in my hometown in March, but it _____ be rather cold sometimes.[ ]

A. must

B. can

C. should

D. would

将以下图形序列中的哪两个调换位置之后，可以呈现出一定的规律性？（）

A．

B．

C．

D．

外斐反应可辅助诊断

A．支原体感染

B．衣原体感染

C．立克次体感染

D．螺旋体感染

E．伤寒杆菌感染

超滤和微滤是利用膜的筛分性质以（）为传质推动力。

A.渗透压

B.膜两侧的压力差

C.扩散

D.静电作用