He was a good swimmer, so he _____ swim 发布时间:2017-06-11 21:39 │ 来源:www.tikuol.com 题型:选择题 问题: He was a good swimmer, so he _____ swim across the river.A.mightB.couldC.wouldD.was able to
题型:选择题 常温下在下列给定条件的溶液中,一定能大量共存的离子组是A.能使pH试纸呈红色的溶液:Na+、NH、I-、NOB.加入铝粉生成H2的溶液:K+、Mg2+、SO、HCOC.l.0 mol·L-1 NaClO溶液:Fe2+、K+、I一、Cl-D.在c(H+)/c(OH-) = 1×1013的溶液:NH4+、Ca2+、C1-、K+ 查看答案