第2题: [多项选择]下列气体中,非极性分子的有() A. HBr B. CO2 C. CH4 D. H2O E. 氦 参考答案:B,C
第3题: [单项选择]A. Mike can’t pass the exam. B. Mike doesn’t need to study at all. C. Mike should get some fresh air in the morning D. Having a good rest will help Mike with the exam. 参考答案:D 答案解析:[听力原文] . M: Mike said he’s going to stay up all night studying for his geography exam tomorrow mo
第4题: [单项选择]葛根的功效是() A. 发表解肌,清利头目 B. 解肌退热,透疹,生津止渴,升阳止泻 C. 解肌退热,疏肝解郁 D. 发表解肌,透疹解毒 E. 发表解肌,利水消肿 参考答案:B