下列物质属于纯净物的是（ ） A.漂粉精 B.氯水 C.盐酸 D.液氯
如图，下列哪一幅图片不属于第三次科技革命的成果？（ ）
He is _____ his lesson _____ the final exam. A. preparing; to B. preparing; for C. ready; to D. ready; for
.________they were singing, the teacher came in.A. Before B. after C. As D. Until
During my high school years, the most important thing was what I was wearing to the Friday night dance and who I was taking．Although college was talked about, it was the least of my worries． W
一个细小物体若被显微镜放大50倍，这里“被放大50倍”指的是细小物体的 （ ） A.体积
阅读分析材料，回答下列问题． 20世纪90年代码来花卉消费的国际需求迅速增长，北美、日本、欧洲成为世界三大花卉消费市场。同期图４所示国家成所
“大抵徽商……其所积蓄，则十一在内，十九在外。”材料表明徽商（ ）A．注重扩大对外贸易 B．注重扩大商业资本C
