下列说法正确的是().
A.遗传力高的性状近交衰退不显著
B.遗传力高的性状近交衰退显著
C.遗传力低的性状近交衰退不显著
D.遗传力高的性状近交衰退显著
E.都不对
参考答案:A
---- Could you play ________ basketball when you were a primary school student?
---- No, I couldn't, but I could play ________ violin.
A.the; an
B./; the
C.a, an
D.the; /
能阻滞钾通道、钠通道和钙通道,明显延长APD的药物是
A.维拉帕米B.普萘洛尔C.利多卡因D.胺碘酮E.奎尼丁