霍乱可发生可引起
A．心源性休克B．感染中毒性休克C．失血浆性休克D．失水性休克E．失血性休克
参考答案：D
--- Has your brother returned from America yet?
--- Yes, but he ______ here for only three days before his company sent him to Africa.
A．has been
B．was
C．will be
D．would be
对过敏性哮喘有效的药物是（）
A.白三烯调节剂
B.色甘酸钠
C.钙拮抗药
D.酮替芬
E.血栓烷A
