Name
Age
Height
Weight
Sarah
11
1.52 metres
35 kilograms
Liu Yun
13
1.60 meters
41 kilograms
Mike
10
1.65 meters
40 kilograms
参考句型: Sarah is . . . than Liu Yun. Liu Yun is . . . than Mike.
将10g溶质的质量分数为98%的浓硫酸稀释为质量分数为10%的稀硫酸,稀释后溶液的质量为多少克?稀释所需的水的质量为多少克?
下列关于HIV、幽门螺杆菌、人体肿瘤细胞的叙述,正确的是( )