细胞膜在静息情况下,对下列哪种离子的通透性最大 ( )
A.Na+
B. K+
C. Cl-
D.Ca2+
E.Mg2+
参考答案:B
If we ______ the other road, we might have arrived here in time for the meeting.
A.take
B.had taken
C.took
D.have taken
女性肺癌多见
A.腺癌
B.腺鳞癌
C.小细胞癌
D.大细胞癌
E.鳞癌