题目

若不等式组表示的平面区域是一个三角形，则的取值范围是 Ａ．            Ｂ．           Ｃ．            Ｄ．或 答案：ＣJoan is an American girl. She lives in China now. She is in my class. Her parents work in China, too, but her brother works in the U.S.A. He often writes letters to them. Joan likes Chinese class very much, and likes speaking Chinese with us after class. Her father teaches us English well. We all like his class. On Sundays, Joan goes to the People's Park with her father and mother. Sometimes she goes shopping with her mother. They like the Chinese food very much. It's a happy family.【小题1】Joan is from ________.A. China B. Japan  C. the U.S.A. D. Canada【小题2】Joan likes speaking ________with us after class.A．ChineseB．EnglishC．FrenchD．Japanese【小题3】Joan's ________ is an English teacher.A．fatherB．motherC．brotherD．father and mother【小题4】How often does Joan go to the shop?A．Often.B．Never.C．Every Sunday.D．Sometimes.【小题5】Which is not wrong?A．Joan's mother is a good doctor.B．There are three people in her family.C．They like to eat the Chinese food a lot.D．The family are all in China.