(B)

    Everyone knows that exercise is important．We all need to exercise．Doctors say it is good for us．It makes your heart and body strong．Children who often exercise are more alert(灵活的).That means they do better in tests and schoolwork than those who don't exercise．

    There are many ways to exercise．You can walk，run，swim，skate or play ball games．Make sure you exercise in the following ways：You have to like what you are doing．Exercise enough--but not too much．It's best to exercise twice a week．Thirty minutes each time is enough．Try all kinds of sports until you find one，two or three sports that feel right for you．

    You can exercise at fitness centers．They have a lot of equipment(设备)there．The equipment will help exercise your arm，legs and other parts of your body to make you healthy．Some people buy equipment for their homes．But it's very expensive．Exercising can be fun．Friends can exercise together at fitness center，or they can play sports together．How do you exercise?

①扩大养猪规模   ②获利减少   ③减小养猪规模   ④获利增加

请阅读下列材料，回答问题。
材料一

（1）根据图一指出秦朝的政治制度是什么？图一中最高权力者是谁？这一政治制度体现了“诸子百家”中哪一家的思想主张？
（2）根据图二指出美国这一政治制度建立的法律依据是什么？你能从图二中看出其政权组织遵循的基本原则是什么？
（3）以上两幅示意图反映出人类政治文明的发展趋势是什么？从中你得到什么认识？
材料二 对于图一秦朝政治制度的缔造者秦始皇，史学家的评价是不同的。现代历史学家翦伯赞认为：在我看来，秦始皇是中国封建统治阶级中的一个杰出人物，我说秦始皇是中国封建统治阶级中的一个杰出人物，不是因为他是一个王朝的创立者，而是因为他不自觉地顺应了中国历史发展的方向，充当了中国新兴地主阶级开辟道路的先锋，在中国历史上，消灭了封建领主制，开创了一个中央集权的封建专制主义的新的历史时代。而古代史学家司马迁却认为：秦为乱政虐刑以残贼天下，数十年矣。北有长城之役，南有五岭之戍，外内骚动，百姓罢敝……财匮力尽，民不聊生。
（4）依据材料并结合所学知识，评述上述关于评价秦始皇的观点。