摘要:第一节 单项填空(共15小题,每小题1分.满分15分) 从A.B.C.D四个选项中.选出可以填入空白处的最佳选项.并在答题卡上将该项涂黑.21. They form a polar molecule, is, ­­ with a slightly positive end and a slightly negative end. A. which; that B. it; one C. that; one D. one; that

网址:http://m.1010jiajiao.com/timu3_id_3069916[举报]

违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com

精英家教网