She was so busy that she didn't stop ___ to us.
A.talk
B.to talk
C.be talking
D.talking
答案:B
我国的代理制度分为()。
A.指定代理
B.表见代理
C.法定代理
D.委托代理
E.转代理
测定水中"三氯"水样的保存温度是()
A.-20℃
B.-80℃
C.4℃
D.20℃
E.37℃