酸枣仁汤的功用是()
A.养心安神,滋阴补肾
B.补肾宁心,益智安神
C.养心安神,和中缓急
D.养血安神,清热除烦
E.滋阴清热,养血安神
参考答案:D
Not until the motorbike looked almost new _________ repairing and cleaning it.
A.he stopped
B.did he stop
C.stopped he
D.he did stop
设f(x)在[0,a)上二次可导,且xf"(x)-f'(x)>0,则在区间(0,a)内()。
A.不增
B.不减
C.单调增加
D.单调减少