A:click on
B:hit on
C:put on
D:touch on
①物理性质:颜色状态____、熔点____、硬度____、密度____②化学性质:____.
如图,盒装纯牛奶的体积为____ m3.若该牛奶的密度是1.2×103kg/m3,则牛奶的质量为____ kg.喝掉一半后,牛奶的密度将____ .(填“变大”、“变小”或“不变”)
I decided____ (buy) it and it was ____ (cheap) than the science book.