火星探测项目是我国继载人航天工程、嫦娥工程之后又一个重大太空探索项目，2018年左右我国将进行第一次火星探测．已知地球公转周期为T，到太阳的距离为R₁，运行速率为v₁，火星到太阳的距离为R₂，运行速率为v₂，太阳质量为M，引力常量为G．一个质量为m的探测器被发射到一围绕太阳的椭圆轨道上，以地球轨道上的A点为近日点，以火星轨道上的B点为远日点，如图所示．不计火星、地球对探测器的影响，则（   ）

    There were three big fish in the lake. One of them, Demo, was wise; another one, Jimmy, was half-wise; Martin, the third one, was stupid.

    Some fishermen came to the bank of the lake with their nets. The three fiss saw them.

    Demo decided at once to leave, to make the long and difficult trip to the ocean. He thought, "I won't discuss with these two about this. They love this place so much that they call it home and will stay on. How silly they are! They still haven't realized we are in great danger now. Their ignorance will cost them their lives."

    Seeing the wise fish had left, Jimmy thought, "My guide has gone and now I've lost my chance to escape." He felt sorry for it and then thought, "What can I do to save myself from these men and their nets? Perhaps I should pretend（假装）to be already dead, giving myself totally to the water."  So he did that. He went up and down with the water, helpless, within arm's reach of the fishermen.

    "Look at this! The best and biggest fish is dead." One of the men lifted him by the tail, and threw him up on the ground. He rolled（滚动）over and over and moved secretly toward the water, and then, back in.

    The third fish was aimlessly jumping about, trying to escape with his speed and cleverness. The net, of course, finally closed around him, and as he lay in the hot frying-pan bed, he thought, "If I get out of this, I'll never live again in the limits of the lake. Next time, the ocean! I'll make it my home."

    Being a sports reporter for more than a decade, I see “Olympic” as a1word to me. I found the word is also a(an)2for everyone to shine. This feeling3me when I was holding the Olympic torch for the4time on Monday in Seoul, the capital city of South Korea.

    I felt such a great5to be invited by the International Olympic Committee to be a torchbearer for the 2018 Pyeongchang Winter Games 6Chinese sports reporters. Ten years ago, I was invited by IOC to be a7for the 2008 Beijing Summer Games. I have now carried the torch in two different countries. I have 8how the Olympic flame 9everybody around it.

    When I arrived at the 10point for the torchbearers, all the staff and even passers-by cheered because they knew I would be joining the11. I could feel their heartfelt12 toward the Olympics. When a group of torchbearers left to join in the relay, all the people13 shouting “Fighting!” While I14my turn, many people came to take photos with me and the torch. In 101 days, the route15nine provinces and eight major cities across the country. With less than a month to go before the Games1 opening ceremonies in Pyeongchang, Seoul had been16 into an Olympic city as well.

    “Let everyone shine' is not just a slogan for the torch relay but 17the fact that ordinary people from every walk of life—students, bakers, teachers, farmer —are18.The Olympic spirit is a lot more than the19 of 'swifter, higher, and stronger.' 'Olympic, has the magic to bring everyone together to20their dreams.

《狗•猫•鼠》一文中，隐鼠的结局是怎样的？