题目

________． 答案：【答案】18 【解析】先求出被积函数的一个原函数，利用微积分基本定理即可得出答案。. =18Eric is an American boy.He is in Shanghai with his parents now.They work in Shanghai，and Eric studies Chinese and kung fu(功夫) in Shanghai.He is in No.10 Middle School.He gets up early and exercises for half an hour every day.He is never late for school.He studies hard.He can read and write English well.He often helps us with our English，and we often help him with his Chinese.He practices Chinese kung fu after school in a club.Sometimes he helps his mother clean the rooms on weekends.He likes Chinese foods very much.He says lots of Chinese foods taste good.He has many friends here.He is friendly to us and we like to play with him.【1】Eric is from America.【2】Eric exercises for thirty minutes every day.【3】Eric never helps us with English.【4】Eric sometimes cleans the rooms on weekends.【5】Eric thinks all of Chinese foods taste good.