A. At least one week. B. Seven months. C. One month. D. At least three weeks. 参考答案:A 答案解析:[听力原文] Doctors in the Canadian city of Toronto say an operation to separate conjoined twins f
第21题: [单项选择]剧烈频繁呕吐可引起() A. 呼吸性酸中毒 B. 呼吸性碱中毒 C. 代谢性酸中毒 D. 代谢性碱中毒 E. 混合性酸中毒 参考答案:D
第22题: [单项选择]Husband: Maybe we should talk with the landlady about it. Wife: ______ A. Never mind. B. Good idea. C. We must. D. Do as you please. 参考答案:B 答案解析:从丈夫的话语内容得知他在提建议,缺失的部分应该是妻子回应丈夫建议的功能表达。回应建议时,或表示赞同,或表示反对。因此B是完成这个交际目的惟一正确表达。