将50g20%氯化钾溶液稀释到200g,稀释后所得溶液中溶质的质量分数是（ ）_______________.27． Jack didn't like to ________ when he was a student．2． I see __________ alarm clock on the table．下列句子中标点
不正确的是（ ）Henry is a little fatter than he wants to be． He ( 1 ) to lose some weight． So he is on diet． He tries not to eat to0 ( 2 ) and he eats very little sugar because it will make him ( 3
把少量下列物质分别放到水中,充分搅拌,l do．30． There are _______in the drawer．我国有文字可考的历史始于Whose bike is this?--- It ______ belong to Adam. Look! His bag is on it.下列理解不恰当的一项是（2
只能与硝酸银溶液反应,不能与稀硫酸反应的是（ ）听第15段材料,回答第19至第22题。19.Why is Annie in the program？14．Not all people like to work but everyone likes to play． All over the world men and wom
a teacher was speaking to a group of students about how to (31) their time．He gave an example those students would never forget．He pulled out a wide jar(罐子) and put it on the table． He also took
