砷为第四周期第VA族元素,砷不可能具有的性质是( ) A.砷在通常情况下是固体 发布时间:2017-07-23 06:04 │ 来源:www.tikuol.com 题型:选择题 问题: 砷为第四周期第VA族元素,砷不可能具有的性质是( )A.砷在通常情况下是固体B.砷可以有-3、+3、+5等多种化合价C.AS2O5对应水化物的酸性比H3PO4弱D.砷的非金属性比磷强
题型:选择题 They desired that they _________ the right to attend the meeting. [ ]A. had B. have C. are D. were 查看答案