2014届重庆市八中中学初三下学期三月月考数学试卷(带解析)

适用年级:初三
试卷号:571769

试卷类型:月考
试卷考试时间:2017/7/26

1.单选题(共4题)

1.
已知点P(2a-3,a+1)在第二象限,则a的取值范围是(   )
A.a>B.a<-1C.−1<a<D.1<a<
2.
函数中自变量x的取值范围是(  )
A.x≠0B.x≠2C.x≠-2D.x>-2
3.
下列运算正确的是(  )
A.a2+a3=a5 B.
C.D.
4.
为了解我校学生参加2013年重庆市联招考试数学学科各分数段成绩分布情况,从中抽取350名考生的中考数学成绩进行统计分析.在这个问题中,样本是指()
A.350
B.被抽取的350名考生
C.被抽取的350名考生的联招考试数学成绩
D.重庆市2013年中考数学成绩

2.选择题(共8题)

5.根据短文内容,选择最佳答案。

    Tony stops his car by the side of the road. He is very tired and wants to get some sleep. Just when he lies down on the seat, a man comes and asks him the time. He looks at his watch and says, “It's a quarter past eight in the morning. “ Tony tries to sleep again, but there is another knock on the window of his car. “Sir, do you know what time it is, please?” a woman asks. He has to look at his watch again and tells her, “It's half past eight a. m..”

    Tony can't sleep well because there are too many people knocking at his window. He writes a note and puts it on the window of his car. It says, “I don't know what time it is!”

    Once again Tony tries to get some sleep. Just at that time, a young man knocks at his window and says, “Hi, sir ! It's a quarter to nine a.m. now!”

6.A: Is your father a teacher?

B: Yes, he is. He ______ at a high school.

7.根据短文内容,选择最佳答案。

    Baloo the bear, Leo the Lion and Shere Khan the tiger have the most unusual and unlikely friendship between them. They were saved eight years ago, when they were cubs only two months old.

    They were first sent to a rescue(救护)center, where they were raised together. Now they are in an American zoo. Because they came here as a kind of family, the zoo built a large clubhouse so that they could all sleep in it.

    Now they have grown up. You can see them playing around like brothers. The three big animals seem to no sense(意识) of their animal differences.

    Baloo and Shere Khan are very close. That is because they rise early, as Leo being a lion likes to spend most the day sleeping. When Leo wakes up the three of them mess around for most of the day before they settle down to some food. It is wonderful to see a giant American Black Bear put his arm around a Bengal tiger and then to see the tiger touch the bear with his nose lightly like a pet cat. You can often see they lie on top of each other for heat and for love.

    “They are not wild animals any more. But you must remember who you are dealing with when you are with them,” said one of the zoo keepers.

8.根据表格内容,选择最佳答案。

Anna: I work in a bank on workdays. My home is about twenty kilometers from my office. I usually go to work by train. I usually get up at 6:30 a.m. and take the train at 7:00 a.m. It usually takes me about thirty minutes to get to my office. I am never late for work.

Joe: I am a student. My home is not far. I can go to school on foot. It takes me about forty minutes. But I often go to school by boat because it is more fun. It takes me about twenty minutes.

Nancy: I'm a waiter. I work in a restaurant from Monday to Friday. I often go to work by bus. It is about five kilometers from my home to the restaurant. It takes me about twenty-five minutes to go to work. Sometimes, I am late for work because there are too many cars and buses on the street.

9.—Would you like to go to the      ?

—Yes, I'd like to. I like pandas very much.

10.—Would you like to go to the      ?

—Yes, I'd like to. I like pandas very much.

11.—Would you like to go to the      ?

—Yes, I'd like to. I like pandas very much.

12.I want to buy a smaller round table. You see this table ________ too much room.

3.填空题(共2题)

13.
某小区20户家庭的日用电量(单位:千瓦时)统计如下:
日用电量(单位:千瓦时)
4
5
6
7
8
10
户数
1
3
6
5
4
1
 
这20户家庭日用电量的众数、中位数分别是
14.
某公司生产一种饮料是由A,B两种原料液按一定比例配制而成,其中A原料液的成本价为15元/千克,B原料液的成本价为10元/千克,按现行价格销售每千克获得70%的利润率.由于市场竞争,物价上涨,A原料液上涨20%,B原料液上涨10%,配制后的总成本增加了12%,公司为了拓展市场,打算再投入现总成本的25%做广告宣传,如果要保证每千克利润不变,则此时这种饮料的利润率是    

4.解答题(共3题)

15.
毕业在即,某商店抓住商机,准备购进一批纪念品,若商店花440元可以购进50本学生纪念品和10本教师纪念品,其中教师纪念品的成本比学生纪念品的成本多8元.
(1)请问这两种不同纪念品的成本分别是多少?
(2)如果商店购进1200个学生纪念品,第一周以每个10元的价格售出400个,第二周若按每个10元的价格仍可售出400个,但商店为了适当增加销量,决定降价销售(根据市场调查,单价每降低1元,可多售出100个,但售价不得低于进价),单价降低x元销售一周后,商店对剩余学生纪念品清仓处理,以每个4元的价格全部售出,如果这批纪念品共获利2500元,问第二周每个纪念品的销售价格为多少元?
16.
先化简,再求值:,其中x为分式方程的根.
17.
计算:
试卷分析
  • 【1】题量占比

    单选题:(4道)

    选择题:(8道)

    填空题:(2道)

    解答题:(3道)

  • 【2】:难度分析

    1星难题:0

    2星难题:0

    3星难题:0

    4星难题:0

    5星难题:0

    6星难题:0

    7星难题:0

    8星难题:1

    9星难题:8