1.

2.

3.

4.

5.

6.

下列关于物体机械能守恒的说法中，正确的是（   ）

7.

我国自主研制的高分辨率对地观测系统包含至少7颗卫星，分别编号为“高分一号”到“高分七号”，它们都将在2020年前发射并投入使用．于2013年4月发射成功的“高分一号”是一颗低轨遥感卫星，其轨道高度为646km，关于“高分一号”卫星，下列说法正确的是（   ）

8.

9.

发射地球同步卫星时，先将卫星发射至近地圆轨道1，然后经点火，使其沿椭圆轨道2运行，最后再次点火，将卫星送入同步圆轨道3．轨道1、2相切于Q点．轨道2、3相切于P点（如图），则当卫星分别在1，2，3，轨道上正常运行时，以下说法正确的是（   ）

10.

11.

12.

13.

如图所示，K₁、K₂闭合时，一质量为m、带电量为q的液滴，静止在电容器的A、B两平行金属板间．现保持K₁闭合，将K₂断开，然后将B板向下平移到图中虚线位置，则下列说法正确的是（   ）

14.任务型阅读
    Sharks have lived in the world's oceans for millions of years. A shark has an extremely good sense of smell. It can find small amounts of substances in the water, such as blood, body liquids and chemicals produced by animals. These powerful senses help them find their food. {#blank#}1{#/blank#}
    Sharks grow slowly. About forty percent of the different kinds of sharks lay eggs. {#blank#}2{#/blank#} Some sharks carry their young inside their bodies as humans do. Some sharks are not able to reproduce until they are twenty years old. Most reproduce only every two years. And they give birth to fewer than ten young sharks. For this reason, over-fishing of sharks is of special danger to the future of the animal.
    {#blank#}3{#/blank#}.They eat injured and diseased fish. Their hunting activities mean that the numbers of other fish in the ocean do not become too great. This protects the plants and other forms of life that exist in the oceans.
    People hunt sharks for sport, food, medicine and their skin. Experts say the international market for some kinds of sharks has increased greatly because many parts of a shark are valuable. {#blank#}4{#/blank#}. Shark liver oil is a popular source of Vitamin. The skin of a shark can be used like leather. In Asia, people enjoy a kind of soup made from shark fins. Experts say a fisherman can earn a lot of money for even one kilogram of shark fins.
    Sharks are among the oldest animals on Earth. {#blank#}5{#/blank#} If too many sharks in one area are killed, the group of shark may never return to normal population levels
A. The others give birth to live young.
B. Sharks are important for the health of the world's oceans.
C. This is a threat to other form of life in the ocean.
D. Collectors pay thousands of dollars for the jaws of a shark.
E. Sharks are valuable to us and we can make full use of them.
F. But some sharks are in danger of disappearing from Earth.
G. Sharks eat fish, other sharks, and plants that live in the ocean

15.

16.

17.

18.

阅读理解

    Living and dealing with kids can be a tough job these days, but living and dealing with parents can be even tougher.

    If I have learned anything in my 16 years, it is that communication is very important, both when you disagree and when you get along. With any relationship, you need to let other person know how you are feeling. If you are not able to communicate, you drift apart. When you are mad at your parents, or anyone else, not talking to them doesn't solve anything.

    Communication begins with the concerns of another. It means that you can't just come home from school, go up to your room and ignore everyone. Even if you just say “Hi”, and see how their day was for five minutes, it is better than nothing.

    If you looked up the word “communication” in a dictionary, it would say “the exchange of ideas, the conveyance (表达) of information, means of communication such as a letter or a message”. To keep a good relationship, you must keep communication strong. Let people know how you feel, even if it's just by writing a note.

    When dealing with parents, you always have to make them feel good about how they are doing as a parent. If you are trying to make them see something as you see it, tell them that you'll listen to what they have to say, but ask them politely to listen to you. Yelling or walking away only makes the situation worse.

    This is an example: one night, Sophie went to a street party with her friends. She knew she had to be home by midnight after the fireworks, but she didn't feel she could just ask to go home. That would be rude. After all, they had been nice enough to take her along with them. Needless to say, she was late getting home. Her parents were mad at first, but when Sophie explained why she was late, they weren't as mad and let the incident go. Communication is the key factor here. If Sophie's parents had not been willing to listen, Sophie would have been in a lot of trouble.

    Communication isn't a one-way deal: it goes both ways. Just remember: if you get into a situation like Sophie's, tell the other person how you feel—listening is the key factor to communication.

19.

20.

如图所示，传送带与水平面之间的夹角θ=30°，其上A、B两点间的距离L=5m，传送带在电动机的带动下以v=1m/s的速度匀速运动．现将一质量m=10kg 的小物体（可视为质点）轻放在传送带的A点，已知小物体与传送之间的动摩擦因数μ= $\frac{\sqrt{3}}{2}$ ，在传送带将小物体从A点传送到B点的过程中，求：（取g=10m/s²）

21.

如图所示，传送带与水平面之间的夹角θ=30°，其上A、B两点间的距离L=5m，传送带在电动机的带动下以v=1m/s的速度匀速运动．现将一质量m=10kg 的小物体（可视为质点）轻放在传送带的A点，已知小物体与传送之间的动摩擦因数μ= $\frac{\sqrt{3}}{2}$ ，在传送带将小物体从A点传送到B点的过程中，求：（取g=10m/s²）

22.

23.

24.

25.

26.

27.

28.

29.

30.

31.

32.