治疗子宫脱垂肾虚证，应首选（）
A.固阴煎
B.保阴煎
C.大补元煎
D.一阴煎
E.一贯煎
参考答案：C
直流电动机反接制动的原理实际上是与直流电动机的反转原理一样的。
My sister wants to work in a tall building which _____ still _____.[ ]
A. is; to be built
B. is; building
C. is ; being built
D. has been ; built
