首先证实引力质量与惯性质量大小关系的人是()
参考答案:牛顿
10 .--- Do you like _____here?
---Oh, yes, the air, the weather and the way of life. Everything is so nice.
A.this
B.there
C.that
D.It
硫化氢和二氧化硫的水溶液均呈酸性,它们对金属的腐蚀程度相当。