在滴定分析方法的选择,以下哪一条件必须满足()。
A.反应按定量关系进行
B.反应速度要快
C.干扰共存物不能存在
D.对于弱酸必须满足cKa≥10-8
参考答案:B
患者,男性,19岁。受凉后出现头痛发热,汗出恶风,鼻鸣干呕,苔白不渴,脉浮缓。辨证为外感风寒表虚证。方剂宜选用
A.麻黄汤
B.桂枝汤
C.小青龙汤
D.九味羌活汤
E.银翘散
Whenever and wherever we are, keep in mind that we should listen more to others. It’s wrong to express ourselves without thinking. Just as we all know, ___________.
A.a good beginning makes a good ending
B.a still tongue makes a wise head
C.a great hope makes a great man
D.a good husband makes a good wife