a bit of后面跟可数名词还是不可数名词

a bit of 后接不可数名词,相当于 a little
如：a bit of water = a little water
a bit of milk = a little milk
另外,还要注意这个常用词组：“have a bit of a cold(有点儿感冒)”,“cold（感冒）”虽然是个不可数名词,但习惯上要加a