1.单选题- (共9题)

A.动量守恒,机械能守恒 | B.动量守恒,机械能不守恒 |
C.动量不守恒,机械能不守恒 | D.动量不守恒,机械能守恒 |
A.A球、B球都向右运动,速度都是1m/s |
B.A球向左运动,速度为1m/s;B球向右运动,速度为2m/s |
C.A球向左运动,速度为5m/s;B球向右运动,速度为1m/s |
D.A球向右运动,速度为0.5m/s;B球向右运动,速度为1.25m/s |

A.1.25 m/s,向右 | B.1.25 m/s,向左 |
C.0 | D.6.25 m/s,向右 |
A.v甲=v乙≥v | B.v<v甲<v乙 |
C.v甲<v≤v乙 | D.v≤v乙<v甲 |

A.vA=vB=vC | B.vA>vB>vC | C.vB>vA>vC | D.vA<vB=vC |

A.两者的速度均为零 |
B.两者的速度总不会相等 |
C.盒子的最终速度为![]() |
D.盒子的最终速度为![]() |
A.I上>I下 | B.I上<I下 | C.I上=I下 | D.条件不足,无法判定 |
2.选择题- (共3题)
从下面两个题目中,任选一题,按要求作文。
题目一: 得太快
题目二:原来 还在
要求:①根据自己的理解,把题目补充完整,写一篇作文。②诗歌除外,文体不限。③文中不要出现含个人信息的地名、校名、人名等。④不少于600字。
阅读下面短文,用括号内所给动词的适当形式填空 (必要时可加情态动词或助动词)
Over the last fewyears, people {#blank#}1{#/blank#} (start) to think that plastic bottles are bad. There are many good reasons for this. Plastic bottles take a lot of time to break down, so there are always a lot of them in landfills(废弃物填埋场).
As the world's largest drink company, the Coca-Cola Company is always able {#blank#}2{#/blank#} ( catch) a good opportunity. It {#blank#}3{#/blank#} (come) up with a new invention, the “Plant Bottle”. The new invention{#blank#}4{#/blank#} partly {#blank#}5{#/blank#} ( make) from plants. Usually, petroleum(石油) is the main material that {#blank#}6{#/blank#} (use) to produce bottles. Therefore, {#blank#}7{#/blank#} (use) plants to produce bottles can cut down the Coca-Cola Company's use of petroleum. Also, the Plant Bottle can be used again. The Coca-Cola Company{#blank#}8{#/blank#} (produce) two billion Plant Bottles by the end of this year.
Muhtar Kent, CEOof the Coca-Cola Company, {#blank#}9{#/blank#} ( tell) a reporter, “We are the first company {#blank#}10{#/blank#} (take) this kind of bottle to the market. This is an important step in our sustainable packaging journey.”
“The Plant Bottle is a kind of innovation. It {#blank#}11{#/blank#} ( show) how businesses can help to deal with climate change problems and put less stress on our valuable natural resources,” said Kate Krebs, the director of Sustainable Resources for the Climate Group.
3.多选题- (共5题)

A.若轨道光滑,给ab一初速度v0,则最终ab、cd一定做匀速运动且速度大小均为0.5v0 |
B.若轨道光滑,给ab施加一个垂直于ab的水平恒定外力作用,则最终二者一定做匀加速运动,且速度差恒定 |
C.若轨道粗糙,给ab施加一个垂直于ab的水平恒定外力作用,则最终二者一定做匀加速运动,且速度差恒定 |
D.若将cd换成固定于MN、PQ间的一电容器,且轨道光滑,给ab施加一个垂直于ab的恒定外力,则最终ab一定做匀加速直线运动 |
A.a球获得的冲量最大 |
B.b球损失的动能最多 |
C.c球克服阻力做的功最多 |
D.三种碰撞过程,系统动量都是守恒的 |

A.过程Ⅰ中,子弹、弹簧和木块所组成的系统机械能不守恒,动量也不守恒 |
B.过程Ⅰ中,子弹和木块所组成的系统机械能不守恒,动量守恒 |
C.过程Ⅱ中,子弹、弹簧和木块所组成的系统机械能守恒,动量也守恒 |
D.过程Ⅱ中,子弹、弹簧和木块所组成的系统机械能守恒,动量不守恒 |
A. 若两球质量相同,碰后以某一相等速率互相分开
B. 若两球质量相同,碰后以某一相等速率同向而行
C. 若两球质量不同,碰后以某一相等速率互相分开
D. 若两球质量不同,碰后以某一相等速率同向而行
4.解答题- (共3题)

①B达最大速度时,A和B的速度;
②B以最大速度与C相碰后,弹簧所具有的最大弹性势能Ep.
-
【1】题量占比
单选题:(9道)
选择题:(3道)
多选题:(5道)
解答题:(3道)
-
【2】:难度分析
1星难题:0
2星难题:0
3星难题:0
4星难题:3
5星难题:0
6星难题:8
7星难题:0
8星难题:6
9星难题:0