和星星一样..直接添加S..算是不可数名词...

Chocolate(巧克力)可数吗?

(C) a small candy made by covering a center,such as a nut,with this substance,so we can say some chocolates,a box of chocolates---
巧克力糖---可数
(U) a sweet brown powder mad by crushing this substance,used for giving a special taste to sweet foods and drinks 巧克力粉 ---不可数

Buddha可数吗

可数吧 。貌似复数很少用，只有a buddha我见过，所以一般还是用is吧

当population表示人口时可数吗，表示人的时候可数吗？？？

有时population可用作可数名词,其前可用不定冠词。例如:


China has a population of about 1.3 billion. (=There is a population of about 1.3 billion in China.) 中国大约有十三亿人口。


New York is a big city with a population of over 10 million. 纽约是一个有一千多万人口的大城市。


在表示多个地区的人口时,population要用复数形式populations。例如:


Many parts of the world, which once had large populations and produced plenty of crops, have become deserts. 世界上很多地区一度人口众多,种植大量的农作物;现在,这些地区已经变成了沙漠。