问题 单项选择题

1,4,13,40,121, ______。

A.1093

B.364

C.927

D.264

答案

参考答案:B

解析: 该数列为倍数的变形数列,即后一项是前一项的几倍再加减一个常数。分析数列可知,4=1×3+1,13=4×3+1,40=13×3+1,121=40×3+1,由此可见该数列属于倍数的变形数列,那么未知项应为121×3+1=364。故选B。

阅读理解

阅读理解。

     Did you know the story about Tom? It was a true story. Tom was an English boy, and he didn't like

soap (肥皂) and water. Three or four times a day his mother said to him, "Tom, your hands are dirty

(脏的) again. Go and wash them. "But Tom never really washed them well. He only put them in the

water for a few seconds and then took them out again.

     Tom's uncle and aunt lived in another city. One day they came to stay with Tom's parents, and they

brought their small son, Ted, with them. Ted was one year younger than Tom and he didn't like soap or

water, either (也).

     The boys sat with their parents for a few minutes, and then they went outside. When they were

together, Tom looked at Ted's hands and said proudly (骄傲地), "My hands are dirtier than yours!"

     "Of course they are. "Ted answered angrily (生气地), "You are one year older than me!"

1. Tom's mother told him to wash his hands ______a day.

A . only three times    

B. more than four times

C. three or four times

D. five times

2. Whose hands were a little cleaner, Tom's or Ted's?

A. Tom's    

B. Ted's

C. Both (都) Tom's and Ted's

D. Neither of (都不) them.

3. From this story we learn ______.

A. Tom liked soap and water    

B. Ted liked soap and water

C. Both Tom and Ted liked soap and water

D. Neither of them liked soap or water

4. When Tom saw Ted's hands, he felt ______.

A. happy    

B. proud    

C. sorry

D. afraid

5. How many people are there in the story?

A. Less than four.

B. Four.    

C. Five.

D. More than five.

单项选择题