涂料按成膜物不同可分为（）和（）两大类。
参考答案：有机涂料、无机涂料
—My son, who is now studying at a university, uses more than 3,000 yuan a month.
—Well, tell him to be economical. After all, ________.[ ]
A. money doesn't grow on trees
B. the morning sun never lasts a day
C. light come, light go
D. penny wise, pound foolish
弭兵
