读下图,我国年降水量分布的总趋势是 [ ] A.从北向南逐渐减少 B.从西北内陆 发布时间:2017-06-19 19:01 │ 来源:www.tikuol.com 题型:选择题 问题: 读下图,我国年降水量分布的总趋势是[ ]A.从北向南逐渐减少 B.从西北内陆向东南沿海递减 C.从西向东逐渐减少 D.从东南沿海向西北内陆递减
题型:选择题 ---The excellent student is said ________in Germany last year .--- No wonder he has a good command of German . A.to studyB.to be studyingC.to have studiedD.studied 查看答案
题型:选择题 在CaF2 (Ksp=5.3×10-9) 与CaSO4 (Ksp=9.1 ×10-6) 混合的饱和溶液中,测得F-浓度为1.8 × 10-3mol/L,则溶液中SO42-的浓度为________mol/L。 查看答案