风热袭表的脉象特征是（）。
A.浮数脉
B.浮滑脉
C.浮紧脉
D.浮缓脉
E.弦滑脉
参考答案：A
--- ___________ is it from Suzhou to Beijing?
--- It used to be a long way, but nowadays, it takes only five hours to get there by high-speed rail.
A．How soon
B．How much
C．How far
D．How long
在某县进行地方性甲状腺肿的患病情况调查，先将全县按山区、丘陵和平原分层，然后再按乡镇分若干群，从中抽取几个乡镇作为样本。这种抽样方法叫
A．单纯随机抽样B．机械抽样C．分层抽样D．整群抽样E．分层整群抽样
