简述陶衣大体作用。
参考答案:
一、美化胎面,起装饰作用;
二、避免坯胎大量吸收釉水和烧裂;
三、填补坯胎气孔。
The school isn't the one I really wanted to go to,but I suppose I'll just have to ________ it.
A.make the best of
B.get away from
C.keep an eye on
D.catch up with
一质点由静止开始做匀加速直线运动,加速度大小为a1,经时间t后立即改做匀减速直线运动,加速度大小为a2,若再经时间t恰能回到出发点,则a1:a2应为( )
A.1∶1
B.1∶2
C.1∶3
D.1∶4