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问题 选择题

已知相交两圆的半径分别为4和7，则它们的圆心距可能是                    

A．2　　　　

B．3

C．6　　　　　

D．11

答案

答案：C

设两圆的圆心距为dcm，∵半径分别为4cm和7cm的两圆相交，∴7-4＜d＜7+4，

即3＜d＜11．故选C

阅读理解
阅读理解
                                      Trip 1 One Week In The Mountains
Bring your strong shoes and warm clothes for this walk in a. beautiful area of the Green Mountains. You    may go hiking or have a try of rock climbing. This is also a protection area for wild animals. You can find many kinds of animals living in this area.
Time：May 8-Mayl4      Tel：64639818     Adult：$ 110.00   Child：$ 55.00
                                      Trip 2 Three Days In The Country
There are many beautiful gardens. Take your camera and enjoy the wonderful sight in Hunter Valley. It is a good place for fishing and horse riding. You can also find different kinds of flowers here. This is also a great walk for bird - lovers.
Time：May 20-May 22     Tel= 63986432    Adult：$ 50.00    Child：$ 25.00
                                     Trip3 Flashlight Adventure
Put on your warm clothes，bring a flashlight (手电筒)，and come for a night walk along the Dungog Valley. It is a trip full of adventure (冒险). A guide will lead the tour. Many of the plants you will see on this trip can only be seen at night.
Time：Mayl6-Mayl8     Tel：63875629     Adult：$ 30.00    Not for children
                                   Trip4 Five Days By The Sea
Wear your sun hat and enjoy wonderful sunshine all the time from morning to evening. Our hotel is next to the sea. We have our own boats too. You can swim in the sea or in the swimming pool. Every day our boat will take you to different places for swimming.
Time：May 23-May 27     Tel：67538293   Adult：$ 80.00    Child：$ 40.00
1. What number may you call if you and your friends want to enjoy the sunshine at the seaside?        
A. 67538293.            
B. 63986432.            
C. 64639818
2. Sam wants to stay in Hunter Valley with his wife, his five - year - old daughter and his seven-year - old son.  How much will it cost?      
A. $ 25.            
B. $ 150.            
C. $ 100
3. David loves sports.  He will take his holiday from May 7 to May 15. What activity will he probable take part in?            
A. Hiking in the mountains.
B. Fishing in the country.
C. Watching plants at night
4. Lucy is a college student.  She is quite interested in science. She wants to know something about the life of plants at night. Which trip will she choose?            
A. Trip l.                      
B. Trip 2.                      
C. Trip 3
5. Which of the following is NOT mentioned according to the four advertisements?            
A . Children couldn't take the Trip 3.          
B. We can see some beautiful flowers in Trip 2.            
C. Trip 4 is very dangerous.
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单项选择题

一般纳税企业发生的下列各项税金中，与企业当期损益无关的是（）。

A．增值税

B．消费税

C．所得税

D．营业税
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