将含泥沙的粗盐提纯,并用制得的精盐配制80g10%的食盐溶液.下列说法错误的是( )
A:配制溶液的步骤是:计算、称量、溶解、转移装瓶、贴标签
B:配制时需用的主要仪器有:天平、药匙、量筒、胶头滴管、烧杯、玻璃棒
C:过滤操作时,搅拌漏斗中的液体,可以加快过滤的速度
D:蒸发滤液时,不断用玻璃棒搅拌,防止液体溅出
I am a middle-school student. Now let 1 tell you something 2 our classroom. It's very 3 There are two maps4 the back wall. 5is a map of China.6 is a map of the world (世界).There are7 desks and chairs in our classroom. There is a big desk 8 theteacher in the front of it. We 9 four classes in the 10 and two in the afternoon
如图是一个由开关控制的灯泡,请将它们按安全用电规定连入电路中.
Daming plays football and is _______ sports.