问题 解答题

蜀山实验学校为进一步改善学校办学条件,多方筹集资金,现准备用一周时间对学校36间相同的教室墙面进行粉刷.某施工队承接这项工程,队中有3名师傅和5名徒弟,若第一天3名师傅去粉刷8个教室,结果其中有40m2墙面未来得及刷;第二天5名徒弟共粉刷了9个教室的墙面.已知每名师傅比徒弟一天多刷30m2的墙面.

(1)求每个教室需要粉刷的墙面面积.

(2)若剩下的工程由一名师傅带一名徒弟去,能否按时完成?

答案

设每个教室需要粉刷的墙的面积为xm2,一名徒弟一天可刷ym2,则一名师傅每天可刷(y+30)m2

由题意得:

8x-40=3(y+30)
9x=5y

解得:

x=50
y=90

答:每间教室需要粉刷的面积为50m2

(2)由(1)可知一名师傅每天可刷120m2

剩下的工程需要:[(36-8-9)×50+40]÷(120+90)=990÷210=4

5
7
(天),

∵4

5
7
<7-2,

∴能按时完成.

阅读理解

阅读短文,选择正确答案。

       Hello, everyone! Today I want to introduce my best friend to you. Her name is Rose. Rose is an outgoing

(外向型) girl. She is not tall. She is very thin. She has a round face and two big eyes.

       Her hair is short. She often wears a pink dress, because pink is her favourite colour. She always has a

smiling face. Everyone likes her very much. So she has many friends.

       Rose is a clever girl. She's our monitor. She works hard at school every day. She is good at English and

Maths. She always does her best to help others with their study. She likes asking teachers questions. Her

homework is always clean and tidy. Her handwriting is very beautiful. She is a top student in our class.

       Rose is a versatile (多才多艺的) girl. She can play the piano. She can draw pictures well. She can play

table tennis. She can swim. She can do many things very well.

       Rose has a pet. It is a small dog. Its name is Xiao Xiong. They are good friends. I like it, too.

       Do you like my best friend, Rose? Can you tell me about your best friend?

1. What colour does Rose like best? [ ]

A. Yellow.

B. Pink.

C. Black.

D. Red.

2. What subject is Rose good at? [ ]

A. Chinese.

B. Maths.

C. History.

D. Science.

3. What is Rose like? [ ]

A. She is tall.

B. She is strong.

C. She is thin.

D. She is fat.

4. What animal does Rose keep as a pet? [ ]

A. A dog.

B. A cat.

C. A duck.

D. A pig.

5. Which of the following sentences is NOT true? [ ]

A. Rose's hair is long.

B. Rose's homework is always clean and tidy.

C. Rose works hard at school.

D. Rose is an outgoing girl.

单项选择题