单项选择题 临床上配制酒精溶液时，不论浓度大小，习惯上作为溶质的都是( ) A．水 B．酒精 C．碘酒 D．碘

单项选择题 —If he ______, he ______ that food. —Luckily he was sent to the hospital immediately. A．was warned; would not take B．would be warned; had not taken C．had been warned; would not have taken D．would have been warned; had not taken

单项选择题 We cannot entertain your suggestion ______ it does not seem workable. A．because B．for C．so D．therefore