下列说法：①已知a=b，b=c，则a=c； ②等式两边都除以同一个数，所得结果仍是等式； ③等式两边都乘以0，所得结果不一定是等式； ④等式两边都减去同一个整式，所得结果不一定是等式； ⑤等式两边都加_刷题宝

题干

下列说法：

①已知a=b，b=c，则a=c； ②等式两边都除以同一个数，所得结果仍是等式； ③等式两边都乘以0，所得结果不一定是等式； ④等式两边都减去同一个整式，所得结果不一定是等式； ⑤等式两边都加上同一个整式，所得结果仍是等式．其中正确的有（　　）

A：2个

B：3个

C：4个

D：5个

上一题下一题 0.0难度选择题更新时间:2020-01-05 06:02:32

答案(点此获取答案解析）

A

同类题1

{\begin{matrix} x - 2 > 0 \\ \frac{x}{2} + 1 \geq x - 3 \end{matrix}

的解集是（）

同类题2

Runner eats ________ healthy food.

同类题3

---What do you think of our design for the new car?
---Pretty good. But I find theirs is _____ worth considering and study.

同类题4

在生态系统中，各种生物的数量和所占的比例总是相对稳定的，这是因为（）

同类题5

根据材料内容，选择正确答案。

Actor wanted by Movie Company

Can you sing and dance? Can you work with other people?

Can you work evenings and weekends?

If you want to be an actor, please call the Movie Company at 9935673.

Wanted

Do you like to talk with different people? Do you like a busy but interesting job? Do you like to join the TV station?

Work time: 8: 30a.m.—5: 50p.m., 5 days a week.

Tel: 2433571, 2433572, 2433573

Add: No. 24, Rose Building, Wilton Street

We need Teachers

Do you love children? Are you friendly to children?

Do you like to teach children English, math, history or biology?

Call the Green Children's School at 5113470 or send your e-mail to Children@yahoo.com

小学学科试题库

初中学科试题库

高中学科试题库