1.单选题- (共6题)
A.重力做正功,拉力做负功,合力做负功 |
B.重力做负功,拉力做正功,合力做正功 |
C.重力做正功,拉力做负功,合力做正功 |
D.重力做负功,拉力做正功,合力做负功 |
A. F/8 B. 3F/8 C. 7F/8 D. 9F/8

A.2eBd/m | B.eBd/m |
C.eBd/2m | D. ![]() |
2.选择题- (共9题)
A stupid man tells a woman to shut up, while a wise man tells her that her mouth is quite beautiful _______ it is closed.
B
Mike works very long hours every day. He usually gets up at 17:00. He has a shower and makes his breakfast. What a funny time to make breakfast! After breakfast, he practices (练习) his guitar for ten minutes, then he puts on his jacket and goes to work. To get to work, he takes the No.17 bus to the Star Hotel. The bus usually leaves at 19:15. He works all night. People love to listen to him! He gets home at 7:00, and he watches the early morning news on TV. He goes to bed at 8:30, a tired but happy man. Can you think what his job is?
Hi! I'm Tony. I love 1! I always get up late on weekends. For breakfast, I only have 2. It's usually an apple. I have a big lunch. After lunch, I like to eat ice-cream. It 3 good. In the afternoon,I like to 4. I usually play basketball. Sometimes I swim. In the evening, I clean the house—I like 5rooms. I always go to bed late,at about 23: 00.
But my sister doesn't like weekends. She has a job in a big store and she always works on weekends. She never goes out 6 her friends. She usually 7 home from work at 22:00. she 8 in bed after she takes a shower. But don't ask her 9 she reads. She always falls asleep (睡着) after 10 one or two pages (页).
Nowadays, you can see many people busy on their smartphones(智能手机) if you look a{#blank#}1{#/blank#}. Smartphones make our lives easier. But have you ever thought a{#blank#}2{#/blank#} what they mean to your eyes? Staring(盯) at smartphones for long time gives you dry eyes and even causes a disease {#blank#}3{#/blank#} (叫做) glaucoma(青光眼).
While you're probably not going to stop using your smartphone, there are a few things you can do to protect your eyes. Hold your phone at least 30 cm away from your eyes when using it. Take a break every {#blank#}4{#/blank#} (小时) and try the following: look at something at least five meters away from you and then focus on the tip of your nose. Repeat this s{#blank#}5{#/blank#} times. It should reduce(减少) the discomfort in your eyes.
3.多选题- (共5题)
A.人走路时,会受到静摩擦力作用 |
B.武警战士双手握住竖立的竹竿匀速攀上时,所受的摩擦力的方向是向下的 |
C.将酒瓶竖直用手握住停留在空中,当再增大手的用力,酒瓶受的摩擦力不变 |
D.在结冰的水平路面上撒些细土,人走上去不易滑倒,是因为此时人与路面间的最大静摩擦力增大了 |
A.小球对地面的压力就是小球的重力 |
B.地面对小球的支持力等于小球的重力,它们是一对平衡力 |
C.小球所受重力的反作用力作用在地面上 |
D.地面对小球的支持力的反作用力是小球对地面的压力 |
A. 地球与月球间的万有引力将变大 B. 地球与月球间的万有引力将变小
C. 月球绕地球运动的周期将变长 D. 月球绕地球运动的周期将变短

A.A受的重力 | B.B受的摩擦力 |
C.A受的支持力 | D.B受的压力 |
A.磁极之间的相互作用是通过磁场发生的,磁场和电场一样,也是一种物质 |
B.磁感线可以形象地表现磁场的强弱与方向 |
C.磁感线总是从磁铁的北极出发,到南极终止 |
D.磁感线就是细铁屑在磁铁周围排列出的曲线,没有细铁屑的地方就没有磁感线 |
4.填空题- (共1题)

5.解答题- (共1题)
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【1】题量占比
单选题:(6道)
选择题:(9道)
多选题:(5道)
填空题:(1道)
解答题:(1道)
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【2】:难度分析
1星难题:0
2星难题:0
3星难题:0
4星难题:0
5星难题:0
6星难题:4
7星难题:0
8星难题:8
9星难题:1