一．选择题(本大题共8小题．每小题2分，共16分)．
1．\(\sqrt {121} \)的平方根是( )．
A．\( – 11\)
B．11
C．\(\sqrt {11} \)
D．\( \pm 11\)
2．若\(\sqrt[3]{m} = – 3\)，\(\sqrt n = 2\)，则n− m的值是( )．
A．\( – 31\)
B．31
C．\(\sqrt 2 – \sqrt[3]{3}\)
D．\(\sqrt 2 + \sqrt[3]{3}\)
八年级上册数学 第4章质量检测试卷1（实数）含答案
一．选择题(本大题共8小题．每小题2分，共16分)．
1．下列语句正确的是( )．
A．64的平方根是 ，记作\( \pm \sqrt {64} = \pm 8\)
B．因为\({\left( { – 1} \right)^2} = 1\)，所以1的平方根是\( – 1\)
B．\( – \sqrt 3 \)表示3 的算式平方根的相反数
D．0.9的算式平方根是0.3
2．下列说法或计算：①64的立方根是\( \pm 4\)；② \(\sqrt[3]{{{x^3}}} = x\)；③\(\sqrt {64} \)的立方根是2；④\(\sqrt[3]{{{{( \pm 8)}^3}}} = \pm 4\)，其中正确的有( )．
A．1个
B．2个
C．3个
D．4个
八年级下册 数学专题练习——反函数（含答案）
1、如图所示，直线 \(y = \frac{1}{2}x\)与双曲线 \(y = \frac{k}{x}\)（k＞0，x＞0）交于点A，将直线 \(y = \frac{1}{2}x\) 向上平移4个单位长度后，与y轴交于点C，与双曲线 \(y = \frac{k}{x}\)（k＞0，x＞0）交于点B，若OA=3BC，则k的值为（ ）．
A．3
B．6
C．\(\frac{9}{4}\)
D． \(\frac{9}{2}\)
（第1题）
八年级下册 数学专题练习——反函数（精选）
1、如图所示，直线 \(y = \frac{1}{2}x\)与双曲线 \(y = \frac{k}{x}\)（k＞0，x＞0）交于点A，将直线 \(y = \frac{1}{2}x\) 向上平移4个单位长度后，与y轴交于点C，与双曲线 \(y = \frac{k}{x}\)（k＞0，x＞0）交于点B，若OA=3BC，则k的值为（ ）．
A．3
B．6
C．\(\frac{9}{4}\)
D． \(\frac{9}{2}\)
（第1题）
八年级下册 数学专题练习——二次根式（精编60题）（含答案）
一、选择题。
1、式子\(\frac{1}{{\sqrt {x – 1} }}\)在实数范围内有意义，则x的取值范围是（ ）
A．x＜1
B．x≤1
C．x＞1
D．x≥1
2、已知，则 \(\sqrt {{{\rm{x}}^2} – 8x + 16}= 4 – x\)的取值范围是（ ）
A．为任意实数
B．0≤x≤4
C．x＞4
D．x≤4
八年级下册 英语 第五单元Good manners选择50题（含答案）
( ) 1.(2015•南京)— Why didn’t Peter his homework？
—He said he had lost his workbook. I think it’s an excuse.
A. does
B. doing
C.do
D. did
( ) 2. (2014•济南) Mr Cooper is tired do anything this morning.
A. so; that
B. too; to
C. both; and
D. so; as
八年级下册 英语 第四单元A good read选择50题（含答案）
( ) 1. (2016•盐城)—Is that man Mr Green？
—It be him. He has gone to Paris on business.
A. may
B. must
C. can’t
D. shouldn’t
( ) 2. (2016•南通) They went climbing the morning of May I and came back the afternoon.
A. on; on
B. in; in
C. on; in
D. in; on
八年级下册 英语 第三单元Online tours选择50题（含答案）
( ) 1. (2016•菏泽) —Did you have good time yesterday?
—Yeah, I really had fun at the party!
A. a; ／
B. a; the
C. /; the
( ) 2. (2016•淮安) Lily often helps her mother do some cooking in the .
A. kitchen
B. garden
C. bathroom
D. bedroom
八年级下册 英语 第二单元Travelling选择50题（含答案）
( ) 1. (2016•铜仁) —Do you know the children over there?
—Yes. names are Mike and Jane.
A. Theirs
B. Their
C. Her
D. His
( ) 2. (2016•绥化) I have friends，so I feel sad.
A. few
B. a few
C. little
八年级下册 英语 第一单元Past and present选择50题（含答案）
( ) 1. (2016•重庆A) It’s sports time. Most students in Class 1 are playing football on the playground.
A. boy
B. boys
C. boy’s
( ) 2. (2014•天津) — you ever the new Minyuan Stadium？
—No, I haven’t.
A. Do; visit
B. Have; visited
C. Did; visit
D. Are; visiting
八年级下册 英语 画线部分提问50题（含答案）
1. They have known each other for a long time.
they each other?
2. I know Zhouzhuang very well because I have lived there for ten years.
you know Zhouzhuang very well?
八年级上册 英语第七单元 Seasons 高频率易错题（含答案）
第一部分 根据句意和汉语或首写字母提示完成单词
1. We have got a cold because the temperature (下降)a lot several days ago.
2. You were short of hands at (收获)time. 继续阅读 八年级上册 英语第七单元 Seasons 高频率易错题（含答案）
八年级上册 英语第八单元 Natural disasters 高频率易错题（含答案）
第一部分 根据句意和汉语或首写字母提示完成单词
1. It rained so (大) this morning that the lake is full of water now.
2. People who have no sense of (方向)often get lost in big cities. 继续阅读 八年级上册 英语第八单元 Natural disasters 高频率易错题（含答案）
八年级上册 英语第六单元 Birdwatching 高频率易错题（含答案）
第一部分 根据句意和汉语或首写字母提示完成单词
1. They were discussing the problems of Western s .
2. Daniel, shall we (get ready)food and drink for the welcome party now? 继续阅读 八年级上册 英语第六单元 Birdwatching 高频率易错题（含答案）
八年级上册 英语第三单元 A day out 高频率易错题（含答案）
第一部分 用括号中所给词的适当形式填空
1. He needs to do more (exercise) to keep fit，I think.
2. It was (bore)to sit there without doing anything. 继续阅读 八年级上册 英语第三单元 A day out 高频率易错题（含答案）
八年级上册 英语第二单元 School life 高频率易错题（含答案）
第一部分 用括号中所给词的适当形式填空
1. You need less money and (few) people to do the work.
2. The Chinese lesson is very (interest) and we all like it.
3. During the (read)Week，we can read all kinds of story books. 继续阅读 八年级上册 英语第二单元 School life 高频率易错题（含答案）
八年级上册 英语第一单元 Friends 高频率易错题（含答案）
第一部分 用括号中所给词的适当形式填空
1. The more trees we plant，the (beautiful)our city will be.
2. Tom is very humorous. He often tells us (fun)stories. 继续阅读 八年级上册 英语第一单元 Friends 高频率易错题（含答案）