与月经产生关系最密切的脏腑是:()
A.心、肝、肾
B.脾、肺、肝
C.肝、心、肺
D.肾、肝、脾
E.肝、肺、肾
参考答案:D
The pilot got over all the difficulties, _______ the plane safe and sound, for which he was highly spoken of.
A.to land
B.landing
C.landed
D.land
神经细胞在兴奋过程中,Na+内流和K+外流的量决定于
A.各自的平衡电位
B.细胞的阈电位
C.Na+-K+泵的活动程度
D.刺激的强度