下列握手礼哪些使用不当()。
A.见到长者,幼者先伸手
B.见到女士,男士先伸手
C.迎接客人时,导游员先伸手
D.告别时,客人向导游先伸手
参考答案:A, B
—How old is the bridge over there?
—Oh, very old. It _____ about three hundred years ago. [ ]
A. is built
B. was built
C. is building
D. has built
诊断肾积水首选的影像学检查是()
A.泌尿系统平片(KUB.
B.静脉尿路造影(IVP)
C.KUB+IVP
D.B超
E.逆行造影