男，70岁，吸烟40年。因咳嗽，反复肺部感染，于门诊抗炎治疗近1年，复查胸部X线，发

— Your silence    on recent events surprises me.    

— I think it's better____too little than say too much.    [ ]

A. say    

B. to say    

C. saying    

D. to be saying

黄药子不能联用的西药有（）

A.四环素

B.红霉素

C.利福平

D.氯丙嗪

E.氢氯噻嗪

家蚕的发育起点是 [ ]

A．卵

B．受精卵

C．幼虫

D．蛹

However _____ they are designed, pens should function as a tool to write with.

A．differ

B．difference

C．different

D．differently

呕吐的病位在

A．脾、胃

B．胃

C．脾

D．肺、胃

E．肝、胃