试题与答案

如图所示为一磁流体发电机示意图,A、B是平行正对的金属板,等离子体(电离的气体,

题型:选择题

题目:

如图所示为一磁流体发电机示意图,A、B是平行正对的金属板,等离子体(电离的气体,由自由电子和阳离子构成,整体呈电中性)从左侧进入,在t时间内有n个自由电子落在B板上,则关于R中的电流大小及方向判断正确的是(  )

A.I= ,从上向下

B.I= ,从上向下

C.I= ,从下向上

D.I= ,从下向上

答案:

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下面是错误答案,用来干扰机器的。

ABCD

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题型:阅读理解

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三、阅读理解(共两节,满分40分)

第一节(共15小题,每小题2分,满分30分)

Grandma Moses is among the most famous twentieth-century painters of the United States, yet she did not start painting until she was in her late seventies. As she once said of herself: “I would never sit back in a rocking chair, waiting for someone to help me.” No one could have had a more productive old age.

She was born Anna Mary Robertson on a farm in New York State, one of five boys and five girls. At twelve she left home and was in domestic(家庭的) service until, at twenty-seven, she married Thomas Moses, the hired hand of one of her employers. They farmed most of their lives, first in Virginia and then in New York State, at Eagle Bridge. She had ten children, of whom five survived; her husband died in 1927.

Grandma Moses painted a little as a child and made embroidery(刺绣) pictures as a hobby, but only changed to oils in old age because her hands had become too stiff(硬的) to sew and she wanted to keep busy and pass the time. Her pictures were first sold at a local market and were soon noticed by a businessman who bought everything she painted. Three of the pictures exhibited in the Museum of Modern Art, and in 1940 she had her first exhibition in New York. Between the 1930s and her death she produced some 2,000 pictures: detailed and lively portrayals(描绘) of the country life she had known for so long, with a wonderful sense of colour and form. “I think really hard till I think of something really pretty, and then I paint it.” she said.

36. According to the passage, Grandma Moses began to paint because she wanted to______.

A. make herself beautiful               B. keep active

C. earn more money                   D. become famous

37. The underlined word “survived” means_____ .

A. graduated from college               B. examined the condition of the house

C. lived longer than the other children      D. gave up themselves to the police

38. From Grandma Moses’ description of herself in the first paragraph, it can be inferred that she wa__________.

A. independent     B. pretty     C. rich     D. nervous

39. Which of the following would be the best title for the passage?

A. Grandma Moses: Her Life and Pictures.    B. The Children of Grandma Moses.

C. Grandma Moses: Her Best Exhibition.    D. Grandma Moses and Other Older Artists.

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题型:多项选择题

曾某无故遭到黄某等人的拦截、殴打,并被黄某用水果刀刺伤。曾某急忙夺路而逃,此时,黄某等人大声叫喊:“抓强盗!”路人叶某不明真相,上前抓住曾某。曾某一时难以挣脱,不得已打伤叶某,得以脱身。事后查明,曾某被黄某刺成重伤,曾某对叶某造成轻伤害。下列关于曾某行为的认定错误的是()。

A.属于正当防卫,不负刑事责任

B.属于假想防卫,意外事件,不负刑事责任

C.属于紧急避险,不负刑事责任

D.属于避险过当,应当负刑事责任

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