米饭是可数名词还是不可数名

I didn't know they grew rice in France.

我本来不知道法国也种稻子。

The people cultivate mainly rice and beans.

这里的人们主要种植稻子和豆类。

Rice flour makes the cake less likely to crumble.

这种糕饼用米粉做不那么容易碎。