紫外光谱中,可用于诊断黄酮、黄酮醇类化合物4'-OH的试剂是
A.甲醇钠 B.醋酸铅 C.醋酸钠-硼酸D.AlCl3 E.AlCl3+HCl
参考答案:A
Don't _____ any more, He is going to _____ a joke. [ ]
A. say; speak
B. speak; tell
C. talk; say
D. speak; talk
经常小便淋漓不尽,伴神疲乏力气短,突然小便闭塞,小腹胀痛,舌淡,脉沉而无力,为
A.虚证转实B.热证转寒C.实证转虚D.因虚致实