A:甲、乙两种物质的溶解度都不相等
B:将接近饱和的甲溶液变为饱和溶液,可采用蒸发或降温的方法
C:t1℃时,甲、乙两种物质的饱和溶液中,溶质的质量分数均为15%
D:t2℃时,将30克乙物质放入100克水中,所得溶液的质量为130克
①编辑、使用数据库
②建立关系数据模型
③数据分析
④创建数据库结构
下列选项中正确的顺序是( )
多音字组词
绿lǜ____ lù____
春天到了,我看到了农民伯伯在____;
Lucy and Tim have a very nice trip to Hangzhou. They arrive in Hangzhou at 3:00 in the afternoon. They see many people at the train station. Some women are sitting and talking. Some men are walking. They go to the West Lake(西湖). They take many pictures. They also go shopping. They buy many gifts for their friends.
根据短文内容,回答问题。
完成图中的光路图.