少阳病证发热的临床表现是（）
A.身热不扬
B.日晡潮热
C.五心烦热
D.身热汗出
E.往来寒热
参考答案：E
51.20g含杂质（杂质不溶于水，也不溶于酸）的锌样品，与一定质量的稀硫酸恰好完全反应，所得溶液质量80.5g，同时生成氢气0.4g．试计算：
（1）样品中锌的质量分数．
（2）完全反应后生成物溶液中溶质的质量分数．
The main types of social networking services are those that contain category places (such as former school year or classmates),which means to connect with friends (usually with self-description pages),and a recommendation system linked to（）
A.net
B.interests
C.others
D.trust
