一次课堂练习，小敏同学做了如下4道因式分解题，你认为小敏做得

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问题选择题

一次课堂练习，小敏同学做了如下4道因式分解题，你认为小敏做得不够完整的一题是[ ]

A．x³-x=x（x²-1）

B．x²-2xy+y²=（x-y）²

C．x²y-xy²=xy（x-y）

D．x²-y²=（x-y）（x+y）

答案

答案：A

阅读理解

阅读短文，选择正确的一项。

I have two new teachers. They are my math teacher and English teacher. My math teacher is short and

strong. He's very funny. My English teacher is from Canada. She's a university student. She's active and smart.

She's tall. We all like her.

1. I have ____________ new teachers.

A. 1

B. 2

C. 3

2. Who's your new teacher?

A. Math teacher and English teacher.

B. English teacher.

C. Chinese teacher.

3. What's your math teacher like?

A. He's tall.

B. He's very funny.

C. He's short and strong.

4. Do you like your English teacher?

A. Yes, we do.

B. No, we don't.

C. Yes, you do.

单项选择题

因食滞胃肠引起泄泻的主要表现是（）

A.泄泻清稀，甚则如水样

B.泄泻腹痛，泻下急迫，或泻而不爽

C.腹痛肠鸣，泻下粪便臭如败卵，泻后痛减

D.大便时溏时泻，迁延反复，稍进油腻食物则发

E.久泻日久，泄泻多在黎明前后