患者，女，54岁。20天内呕血2次，每次约20～30分钟，之后大便发黑，乙肝病史30

工业用盐亚硝酸钠（NaNO₂）外观极像食盐，人若误食亚硝酸钠会中毒．亚硝酸钠中氮元素的化合价是（　　）

A．+l

B．+2

C．+3

D．+4

周礼的基本原则是“亲亲”、“尊尊”。以下对此原则表述正确的是

A．“亲亲君为首”

B．“尊尊君为首”

C．“尊尊父为首”

D．“亲亲尊为首”

If more than one raft is manned after the vessel has sunk，you should（）.

A.go in a different direction in search of land

B.spread out to increase the possibility of a search aircraft finding you

C.reduce the number of rafts by getting as many people as possible into as few rafts as possible

D.tie the rafts together and try to stay in a single group

简述利尿药的临床应用。

足厥阴肝经的五输穴，依序排列应该是（）

A.曲泉、中封、太冲、行间、大敦

B.太敦、行间、太冲、中封、曲泉

C.大敦、太冲、行间、曲泉、中封

D.行间、大敦、太冲、曲泉、中封

E.大敦、行间、太冲、曲泉、中封