残留在铝酸钠溶液中的二氧化硅在分解时会随同氢氧化铝一起析出，提高了产品质量。
参考答案：错
体积是30cm3的空心铜球，质量是178g，若在空心部分注满水，可注水______克．
It is raining so heavily now. Playing basketball on the playground is _____________
A．out of question
B．out of the question
C．out of breath
D．out of envy
