"Do you want the pants ""My pants laid in bed."
A.is
B.was
C.are
D.being
参考答案:C
具有补益肺、脾、肾三脏功效的药物是
A.补骨脂
B.益智仁
C.天门冬
D.山药
E.西洋参
为什么要对大坝进行渗流观测?