五年级50名学生上体育课，老师出了一道题目：现在我拿来一些篮球_爱下问搜题

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问题解答题

五年级50名学生上体育课，老师出了一道题目：现在我拿来一些篮球，如果每5人一组玩一个篮球，有些同学没有球玩；如果每6人一组玩一个篮球，就会有一组玩篮球的人数不足6个。你们知道有几个篮球吗？

甲同学说：如果有x个篮球，5x＜50；乙同学说：如果有x个篮球，6x＞50。

你明白他们的意思吗？

答案

解：甲同学说的意思是：如果每5人一组玩一个篮球，那么玩球的人数少于50人，有些同学就没有球玩；乙同学说的意思是：如果每6人一组玩一个篮球，那么就会有一个组玩篮球的人数不足6人。

阅读理解

阅读理解。

Today in History

June 11
Q: When was the movie "ET" released?
A: "ET", the story of a space alien who was friendly to a lovely earthling boy, was shown on this
day in 1982. "ET" is one of the highest grossing movies of all time.

June 12
Q: What is the most famous diary of the 20th century?
A: It is "The Diary of Anne Frank," written by a young Jewish girl. Anne Frank, who was born on
this day in 1929, wrote about the two years she spent in hiding with her family, trying to escape
Nazi persecution.

July 18
Q: What great amusement park opened on this day in 1955?
A: It was Disneyland, in Anaheim, California. Every year several million people visit the park. In
1971, another amusement park, Walt Disney World opened in Orlando, Florida.

July 20
Q: Who left this plaque which reads "Here men from the planet Earth first set foot upon the moon
July, 1969, AD. We came in peace for all mankind."?
A: It was Neil Armstrong, who was the first human being to set foot on the moon on this day.
From the time he was a child, Armstrong knew he wanted to be a pilot.

1. release 发行                                               2. space alien 外星人
3. grossing 赚钱的                                         4. Jewish 犹太人
5. Disneyland 迪斯尼乐园                               6. Nazi persecution 纳粹的迫害
7. plaque 薄金属板                                         8. pilot 飞行员

1. Ann Frank was famous for her diary about _______.

A. her staying with her family
B. her difficult childhood
C. her short life in prison
D. her two years to get away from Nazi

2. In the past 40 years, _______.

A. a space alien has visited the earth
B. "ET" has made a lot of money
C. man has taken a great step
D. Armstrong's dream has come true

3. Disneyland first appeared in America _______ years ago.

A. 55
B. 35
C. 51
D. 71

选择题

某化肥厂今年一月份某种化肥的产量为20万吨，通过技术革新，产量逐月上升，第一季度共生产这种化肥95万吨，设二、三月份平均每月增产的百分率为x，则可列方程（　　）

A．20（1+x）²=95

B．20（1+x）+20（1+x）²=95

C．20+20（1+x）+20（1+x）²=95

D．20（1+x）²=95-20