问题 不定项选择

如图所示,利用静电计研究平行板电容器的电容与哪些因素有关。实验过程中,平行板上的电量可认为不变。下列叙述中正确的是

[ ]

A.将N板向下平移,静电计指针偏角变小

B.将N板向右平移,静电计指针偏角变小

C.在M、N之间插入一块金属板,静电计指针偏角变大

D.在M、N之间插入一块绝缘介质板,静电计指针偏角变小

答案

BD

阅读理解

阅读理解。

      New York, 10 November 5:27pm, yesterday. Biggest power failure in the city's history.   

     *Thousands of people got stuck in lifts. Martin Saltzman spent three hours between the 21st and 22nd

floors of the Empire State Building. "There were twelve of us. But no one panicked. We passed the time

telling stories and playing word games. One man wanted to smoke but we didn't let him. Firemen finally got

us out."   

     *"It was the best night we've ever had.," said Angela Carraro. who runs an ltalian restaurant on 42nd

Street. "We had lots candles on the tables and the waiters were carrying candles on their trays. The place

was full and all night, in fact, for after we had closed, we let the people stay on and spend the night here."   

     * The zoos had their problems like everyone else. Keepers worked through the right. They used blankets

to keep flying squirrels and small monkeys warm. While zoos had problems keeping warm, supermarkets

had problems keeping cool."All of our ice cream and frozen foods melted," said the manger of a store in

downtown Manhattan. "They were worth $50,0000."   

     * The big electric clock in the lobby (大厅) of the Waldorf-Astoria Hotel in downtown Manhattan started

(滴答) again at 5:25 this morning. It was almost on time.

1. Throughout the period of darkness, Martin Saltzman and the eleven others were ______.   

A. nervous

B. excited

C. calm

D. frightened

2. In what way was the night of November 9 the best night for Angela Carraro?   

A. She had a taste of adventure.   

B. Burning candles brightened the place.   

C. Business was better than usual.   

D. Many people stayed the night in her restaurant.

3. How long did the power failure last?   

A. Nearly 12 hours.

B. More than 12 hours.   

C. Nearly 24 hours.

D. More than 24 hours.

单项选择题