染色体检查时常用的有丝分裂原是()
A.ConA
B.PHA
C.美洲商陆
D.秋水仙素
E.秋水仙胺
参考答案:B
_________ there’s the slightest chance that the baby can come to life, the mother will never stop taking care of it.
A.As well as
B.As long as
C.As though
D.As soon as
如图,篮球放在光滑水平地面上与竖直墙面相靠,且处于静止状态,则篮球的受力情况是
A.受重力、水平面的支持力和墙面的弹力
B.受重力、水平面的支持力和墙面的静摩擦力
C.受重力、水平面的支持力和水平面的静摩擦力
D.受重力和水平面的支持力