题型:问答题 简答题 向一定量的K2CO3溶液中缓慢滴加稀盐酸,并不断搅拌。随着盐酸的加入,溶液中各离子数目也相应地发生变化。溶液中各离子数目与图中四条曲线的对应关系完全正确的是[ ] a b c dA.Cl- K+ CO32- HCO3-B.K+ CO32- Cl- HCO3-C.K+ CO32- HCO3- Cl-D.K+ HCO3- Cl- CO32- 查看答案
题型:问答题 简答题 You had better ________ some time every day for sports so that you can keep yourself energetic.[ ]A. set aside B. take up C. put away D. give out 查看答案