世界上第一次群众性的、政治性的无产阶级革命运动发生在 [ ]
A．英国
D．德国
C．法国
D．美国
答案：A
My wife ______the night shift when my plane ______. That’s why no one is to meet me at the airport today.
A．will have worked; has arrived
B．was working; arrived
C．will be working; arrives
D．is working; is arriving
对于开放性骨折，一般认为在伤后几小时内清创创口，绝大多数能一期愈合（）
A.3～4小时
B.6～8小时
C.8～10小时
D.10～12小时
E.24小时
