下列运算正确的是{"A":"\uff08\ufe63 xy2{#\/mathml#} \uff093= x3y6{#\/mathml#}","B":"2x6y{#\/mathml#} \u2022 3y2x2{#\/_刷题宝

题干

下列运算正确的是（）

A：（﹣ $\frac{x}{y^{2}}$ ）³= $\frac{x^{3}}{y^{6}}$

B： $\frac{2 x}{6 y}$ • $\frac{3 y^{2}}{x^{2}}$ = $\frac{y}{2 x}$

C： $\frac{1}{x - 1}$ ÷ $\frac{x}{1 - x}$ =﹣ $\frac{1}{x}$

D：（﹣ $\frac{1}{x}$ ）^﹣¹=x

上一题下一题 0.0难度选择题更新时间:2019-04-06 10:14:37

答案(点此获取答案解析）

C

同类题1

已知a、b为两个连续的整数，且a˂

˂b，则a+b=______

同类题2

要大力发展生产力，坚持以经济建设为中心，聚精会神搞建设，一心一意谋发展，这是①增强综合国力，提高我国国际地位的基础 ②社会主义的本质要求 ③我国所有制结构的要求 ④解决我国社会主义初级阶段主要矛盾的要求

同类题3

关于酶的叙述，错误的是（　　）

同类题4

孝敬父母，最重要的是对父母（）

同类题5

A. At last，we watched the dolphin show(海豚表演).

B. Sure，I'd love to!

C. I went to the Sea World with my parents.

D. Where did you go?

E. Can I speak to Bill，please?

F. By the way，why did you call me?

Jack：Hello! This is Jack. ____

Bill：This is Bill speaking.

Jack：Hi，Bill! I called you yesterday，but nobody answered the phone.

Bill：____

Jack：How cool! Did you have a good time?

Bill：Yes! We saw whales，seals，sharks…____That was interesting!

Jack：That sounds good.

Bill：____

Jack：Oh，tomorrow is my birthday. There will be a birthday party in my house. Would you like to come?

Bill：____See you tomorrow!

Jack：See you!

小学学科试题库

初中学科试题库

高中学科试题库