题目

植物茎的向光性说明了生物体的 A.适应性         B.应激性         C.遗传性       D.变异性 答案：B 解析: 植物的向性、感性、动物的趋性,都属应激性。第31-35题讲述了如何再日常生活中得体地、礼貌地表达自己的想法。请仔细阅读各题，并从A-F选项中，选出符合各个生活情景所涉及的最佳主题。其中有一项是多余选项。【1】Watching an average TV show requires very little brain power and brings the same result as paying no attention to physical exercise. Your brain will become weak just as your muscles do. If you watch TV, choose something educational and knowledgeable.【2】Acquiring a new language includes different learning ways. Learning a language sharpens your brain and helps stay away from memory problems in later years.【3】Each week, choose an animal, a bird or a fish, and read everything you can about it. Stretch your brain as you become an expert on the subject.【4】If you are right-handed, use your left hand for everyday activities, or use your right hand if you are left-handed. Doing familiar things in a new way will cause your brain to create new neural(神经的) networks.【5】As you read, take the time to look up people or places that aren’t familiar. Reading increases your vocabulary if you search for words and meanings that you don’t know.A. Read oftenB. Master a new subjectC. Use the hand that isn’t used muchD. Play video gamesE. Learn a new languageF. Spend less time on your TV viewing