问题 选择题

已知点A(x,x-2),不论x取何值,点A不会在(  )

A.第一象限

B.第二象限

C.第三象限

D.第四象限

答案

因为

x>0
x-2>0
的解集为x>2,所以点A可能在第一象限;

因为

x<0
x-2>0
无解,所以点A不可能在第二象限;

因为

x<0
x-2<0
的解集为x<0,所以点A可能在第三象限;

因为

x>0
x-2<0
的解集为0<x<2,所以点A可能在第四象限.

故选B.

阅读理解

阅读理解。

     I'm a school girl. My brother and I are twins. We are both at school. We like school. My parents

are both teachers. They work hard. My brother and I study at No. 1 Middle School. There are

twenty-five boys and eighteen girls in our class.

     We go to school from Monday to Friday. We have no classes on Saturdays and Sundays. We

usually get up at six o'clock, and have breakfast at half past six. We come to school at seven o'clock.

Classes begin at eight. We have four lessons in the morning and two in the afternoon. We have lunch

a fifteen past twelve. At three fifty we have sports.

    We study Chinese, math, English, geography, physics, history, politics and other lessons. We like

Chinese. We like English, too. Some of us are good at it.

    We go home at five o'clock. We have supper at six o'clock. We do our homework at seven every

evening and go to bed at half past time, but sometimes we go to sleep at about ten. 

    We work hard, we study for the people.

1. My brother is _____  and I am _____.

A. a worker; a student  

B. a student; a worker  

C. a student; a teacher  

D. a student; a student

2. We have _____ a fifteen past twelve.

A. breakfast    

B. lunch  

C. supper  

D. dinner

3. We begin to do our homework from _____ to _____ ever evening.

A. Monday; Friday    

B. seven; nine  

C. school; home  

D. six; eight

4. There are _____ boys and _____  girls in our class.

A. twenty-five; twenty  

B. some; any  

C. twenty-five; eighteen 

D. many; much

5. Do they often have sports in the morning or in the afternoon?

A. Yes, they do  

B. No, we don't  

C. In the morning  

D. In the afternoon

单项选择题