迟脉的主病是（）。
A.虚热证
B.痰饮
C.寒证
D.血瘀
E.气滞
参考答案：C
从n个人中选出2个，分别从事两项不同的工作，若选派方案的种数为72，则n的值为 [ ]
A．6
B．8
C．9
D．12
The progress of civilization itself can be measured by its range of mathematics.
A．considered
B．decided
C．assessed
D．found out
