反不正当竞争法是指经过国家制定的，用以调整在市场经济活动中形成的（）的法律规范的总称

21．In recent years      global warming has become     concern for people all over the world.

A．the, the

B．/,/

C．/, a

D．the, /

— Where did the accident happen?

— It was at the post office near the hotel _____ the peace talk would be held. [ ]

A. that

B. which

C. where

D. when

反映一定时期企业经营成果的会计要素有()

A.收入

B.费用

C.投资

D.利润

E.所有者权益

早孕的临床症状为()

A．停经

B．早孕反应

C．尿频

D．蒙氏结节

E．以上都是

庆大霉素与呋塞米合用时可引起

A．抗菌作用增强

B．肾毒性减轻

C．耳毒性加重

D．利尿作用增强

E．肾毒性加重