应用元素周期律推断,下列说法正确的是 A.Sr(锶)的碳酸盐难溶于水 B.Tl( 发布时间:2017-06-13 17:53 │ 来源:www.tikuol.com 题型:选择题 问题: 应用元素周期律推断,下列说法正确的是A.Sr(锶)的碳酸盐难溶于水B.Tl(铊)的氢氧化物是两性氢氧化物C.SiH4比CH4更稳定D.H3AsO4酸性比H3PO4强
题型:选择题 It is reported that single-parent children _____ some of the functions that the absent adult in the house would have served. [ ]A. take up B. take over C. take in D. take on 查看答案