问题 问答题 简答题

试结合下图说明EGR阀的检查方法?

答案

参考答案:

用手动泵给EGR阀膜上方施加约15KPa的真空度时,EGR阀应能开启;不施加真空度时,EGR阀应能完全关闭。否则应更换。

阅读理解

阅读理解。

     It was the first of April. Lisa got up and looked out of the window. It was all white and there were no

  tracks (足迹) in the snow. "Wonderful! Let's walk in the snow," Lisa called to her family. "Sorry. I'm

 doing my homework, Lisa," said her brother Joe.

     "Breakfast will be ready soon," said Mrs Black in the kitchen.

     "Don't stay out too long," said Lisa's elder sister, Betty.

     "I won't," said Lisa. She went out and took twenty big steps to the end of the walk (散步的小路) and

  stopped.

     Five minutes later, Mrs Black said to Joe, "Call Lisa. It's time to eat breakfast."

     Joe went to the door, "I didn't see her outside."

     Betty went out and then came back, "Lisa's tracks stop at the end of the walk. There are no tracks

 coming back to the house."

     "Where can she be?" Mrs Black said.

     "Oh, don't worry, Amy. Let me go out and look for her." said Mr Black.

     "APRIL FOOL!" called Lisa, jumping from the hall closet (壁橱). "Lisa!" said Joe. "How did you get

  here?"

1. We know from the passage that _____ before Lisa got up.

    A. rained

    B. snowed

    C. was windy

    D. was sunny

2. When Mrs Black was in the kitchen, Joe was _____ .

    A. listening to music

    B. helping clean the house  

    C. doing his homework    

    D. watching TV

3. What does the underlined word "steps" mean?

    A. 脚步

    B. 车站

    C. 台阶  

    D. 空间

4. There are _____ people in Lisa's family.

    A. two

    B. three

    C. four  

    D. five

5. Which of the following is TURE?

    A. Joe found Lisa in the hall closet.    

    B. Lisa's father wasn't at home on April 1st.

    C. Lisa's mother was Amy.

    D. Joe made a snowman outside.

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