问题 填空题

抛一枚均匀的正方体骰子,骰子每个面分别标有数字1,2,3,4,5,6,则:

(1)P(掷得点数3)=______;

(2)P(掷得点数是奇数)=______;

(3)P(掷得点数是两位数)=______;

(4)P(掷得点数不大于6)=______.

答案

∵抛一枚均匀的正方体骰子,骰子每个面分别标有数字1,2,3,4,5,6,掷得点数3的只有1种情况,掷得点数是奇数的有3种情况,掷得点数是两位数的没有,掷得点数不大于6的有6种情况,

∴(1)P(掷得点数3)=

1
6

(2)P(掷得点数是奇数)=

3
6
=
1
2

(3)P(掷得点数是两位数)=0;

(4)P(掷得点数不大于6)=

6
6
=1.

故答案为:(1)

1
6
,(2)
1
2
,(3)0,(4)1.

阅读理解

阅读理解。

     As Sam slowly woke, he got a funny feeling in his stomach. He knew he would have to do something

that he had been afraid to do for a long time.

     The school bus came on time, and he sat with his friend, Billy. They chatted about baseball. It was a

great way to get his mind off what he had to do later. As they got close to the school, he could feel his heart

beating. His hands were starting to sweat. He hated this!

     He entered Mrs. Owen's class. She was smiling, and saying hello to all her students as she did every

morning.

     "Hi, Sam!" she said as he walked in.

     "Hi," he said and quickly sat in his seat. Then the class began to take their spelling test. He looked at the

clock. The time was near. He hoped he was not first! Mrs. Owens said it was time to begin their special day.

     "Sam, you'll be first." Mrs. Owens said to the class, "Sam has worked very hard on his report on Hawaii,

and I know it is very interesting."

     Sam nervously greeted his class. Then, he thought about the fun things he had read about surfing,

volcanoes, and pineapples in Hawaii, and he started to talk. He talked in front of the whole class, and it was

fun. The class clapped as he finished and Mrs. Owens was smiling. It wasn't terrible at all and he knew he

would do better the next time.

1. How did Sam feel after he woke?

A. Excited.

B. Nervous.

C. Happy.

D. Hungry.

2. What did Sam have to do that day?

A. To have a baseball match.

B. To take a reading test.

C. To go to a new class.

D. To do something special.

3. What does the underlined word "sweat" probably mean?

A. 触摸

B. 鼓掌

C. 出汗

D. 指点

4. Which could be inferred (推断) from this passage?

A. Sam hated chatting about baseball.

B. Sam learned about Hawaii by travelling.

C. Mrs. Owens is unfriendly to her students.

D. The class enjoyed Sam's talk very much.

5. Which is the best title for this passage?

A. A special day

B. An interesting lesson

C. A nice teacher

D. A professional report

材料分析题