Without the contributions of Qian Xuesen, the father of Chinese missile, the achievements in space technology       unthinkable in China．

A．would be

B．would have been

C．might be

D．should have been

对地高辛过量中毒引起的心动过速，哪一项是不应采取的措施（）

A.用呋塞米加速排出

B.停药

C.给氯化钾

D.给苯妥英钠

E.给地高辛的特异性抗体