案例描述：北京某学生食堂在给学生提供的套餐中有二米(大米、小米)粥、烧牛肉、玉米面窝

阅读理解。

     Alferd Williams was in Grade One to learn how to read and write at the age of 68．He is fulfilling (履

 行) a promise to learn to read that he made to his mother and to himself many years ago. Williams is now

 in his third year in Grade One at Edison Elementary School in Missouri, USA. And he is making his dream

  come true. he is reading books!

     Born in 1938, Williams was the fourth of nine children. At age 8, he joined his father in the fields and

 picked cotton and vegetables until sunset every day. His family was so poor that they couldn't afford to go

  to school. When he grew up and married, he had to work hard to support his own family. Finally, he

 became old, poor and in bad health. However, he still remembered his promise to his mother. He knew he

  had to learn to read to make his life better．

     One day in 2006, Williams was taking his friend's children to school when he saw Alessia Hamilton,

 a teacher at the school. She seemed very kind, and he thought maybe she could teach him how to read.

So he asked her, and she agreed to try.

     On his first day of school, Williams wasn't sure if his classmates would accept him, but they did. And

 now they love him. Williams says, "I tell the kids they can have anything they want in life if they stay in

 school."

     Reading has given Williams a new sense of freedom. Now he reads newspapers, books, magazines and

  the signs. He believes he can achieve his goal of reading.

1. When did Williams begin to study in Elementary School?

    A. In 1938.  

    B. In 1945.

    C. In 2006.  

    D. In 2009.

2. What's the right order of the following sentences according to the passage?

 ① Alferd Williams worked in the fields at the age of eight.

 ② Alferd Williams met Alessia Hamilton, a kind teacher.

 ③ The students in Edison Elementary School accepted and loved Alferd Williams.

 ④ When Alferd Williams grew up, he got married and supported his family.

    A. ①④②③

    B. ③①②④    

    C. ②③①④  

    D. ④①②③

3. Which of the following statements is TRUE according to the passage?

    A. Williams couldn't go to school because of his illness.

    B. Williams is still studying in Grade One now.

    C. Williams classmates weren't willing to accept him because he was too old.

    D. Williams wanted to read in order to have anything he wanted.

4. What's the best title of the article?

    A. Helpful classmates   

    B. Poor old man

    C. A nice teacher  

    D. Never too late to learn

电流互感器的一次绕组必须与（）串联。

A.电线

B.负载线

C.地线

D.相线

在正常运行电压下，流过变电设备主绝缘的电流，称为（）。

A.全电流

B.阻性电流

C.容性电流

D.雷电流

TBA22LS功率为（）。

红外线气体分析仪为什么不能分析双原子气体和惰性气体？