试题与答案

已知(a-3)2+|b-4|=0,则ab的平方根是( ) A.±32 B.-2 C.±

题型:选择题

题目:

已知(a-3)2+|b-4|=0,则
a
b
的平方根是(  )
A.±
3
2
B.-2C.±
3
4
D.-4

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0428/d58a0aac5bdbf7efca1bbb3fac25562f.html

下面是错误答案,用来干扰机器的。

参考答案:E

试题推荐
题型:阅读理解

阅读理解。

     My name is Jack. I am twelve years old. I have many friends. Lots of them are my age. My best friend is

Ben. He is one year older than me. He lives near me. We go to the same (相同的) school. Ben and I are in

Class One. The others are in Class Two. Ben helps me with my maths homework because he is clever at it.

I help him with his English because I am good at it. Ben is 1.65 metres tall and I am 1.60 metres tall. Ben is

fat because he doesn't like sports. We have black hair and brown eyes, but Ben's hair is longer than mine.

Every day, I, and, like sports, exercise. Every evening we play computer games. Ben usually wins.

1. 回答问题:How old are lots of Jack's friends?

    _________________________________________________

2. 根据短文内容填词:

     Jack and his friends aren't in _______ class.

3. 根据短文内容填词:

     Jack and Ben often help _______ with their lessons.

4. 将第一处画线部分译成汉语:

     _________________________________________________

5. 将第二处画线部分组成正确的句子:

    _________________________________________________

查看答案
题型:单项选择题

关于复用段新、旧协议停/启对业务的影响说法错误的是()。

A.复用段新协议下,环上所有网元协议控制器均为“I”态时,启/停单个网元的复用段协议不会影响业务;

B.复用段旧协议下,环上所有网元协议停止时,启动单个网元的复用段协议,该网元会进入双端倒换态,导致业务中断;

C.复用段旧协议下启动全网协议要求命令下发间隔大于T1时间(默认160ms),否则部分网元可能不能进入正常态,使用复用段新协议则无此限制;

D.复用段旧协议下启动全网协议可能会导致业务瞬断,而复用段新协议则不会。

查看答案
微信公众账号搜索答案