试题与答案

他是20世纪中国走在时代前列的第一个伟人,是中国民主革命的伟大先行者。他是 [

题型:选择题

题目:

他是20世纪中国走在时代前列的第一个伟人,是中国民主革命的伟大先行者。他是 [ ]

A、谭嗣同

B、孙中山

C、毛 * *

D、邓 * *

答案:

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下面是错误答案,用来干扰机器的。

答案:B题目分析:产生摩擦力的条件是接触面粗糙,有正压力即弹力有相对运动或者相对运动趋势,所以有摩擦力一定有弹力选项B对。但是有弹力并不一定有摩擦力,选项A错。滑动摩擦力,大小与弹力成正比,但是静摩擦...

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题型:阅读理解

阅读理解。

     For more than six million American children, coming home after school means coming home to an empty

house. Some deal with the situation by watching TV. Some may hide. But all of them have something in

common. They spend part of each day alone. They are called latchkey children. They're children who look

after themselves while their parents work. And their bad condition has become a subject of concern.

     Lynette Long was once the headmistress of an elementary school. She said, "We had a school rule against

wearing jewelry. A lot of kids had chains around their necks with keys fastened. I was constantly telling them

to put them inside their shirts. There were so many keys. It never came to my mind what they meant." Slowly,

she learned they were house keys.

     She and her husband began talking to the children who had them. They learned of the impact (影响)

working couples and single parents were having on their children. Fear is the biggest problem faced by children

at home alone. One in each three latchkey children the Longs talked to reported being scared. Many had

nightmares and were worried about their own safety.

     The most common way latchkey children deal with their fears is by hiding. It might be in a shower stall,

under a bed, or in a closet. The second is TV. They'll often play it at high volume. It's hard to get statistics (情

况) on latchkey children, the longs learned. Most parents are slow to admit they leave their children alone.

1. The main idea about "latchkey" children is that they _____. [ ]

A. are growing in numbers

B. suffer problems from being left alone

C. watch too much television during the day

D. are also found in middle-class neighborhoods

2. Which sentence in the second paragraph is the topic sentence? [ ]

A. We had a school rule against wearing jewelry.

B. A lot of kids had chains around their necks.

C. They were house keys.

D. I was constantly telling them to put them inside their shirts.

3. The main feeling these children have when they are at home by themselves is _____. [ ]

A. tiredness

B. freedom

C. loneliness

D. fear

4. We may draw a conclusion that _____. [ ]

A. it's difficult to find out how many latchkey children there are

B. latchkey children try to hide their feelings

C. latchkey children often watch TV with their parents

D. latchkey children enjoy having such a large amount of time alone

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