安徽省合肥市20xx届高三上学期第二次月考英语试卷

安徽省合肥市20xx届高三上学期第二次月考英语试卷内容摘要：

ears ago， ” Weintraub said. “A few people started getting s on their phones, and people thought that was crazy. Same kind of thing. We see people bending their heads to look at their smartphones, and it39。 s unnatural， ” he said. “There39。 s gonna be improvements to that, and this a step there.” 28． One of the possible functions of the smartphone－ like glasses is to ________． A . provide information about your surroundings . supply you with a picture of the future C. program the opening hours of a bar the maps and GPS in your smartphones 29． The underlined phrase “pop up” in the third paragraph probably means “________”． A. develop rapidly B. appear immediately C. get round quickly D. go over automatically 30． According to Sam Biddle, the smartphone－ like glasses are ________． A. expensive for average consumers B. attractive to New Yorkers C. available to people worldwide D. necessary for teenagers 31． We can learn from the last two paragraphs that the smartphone－ like glasses ________． A. are as mon as smartphones B. may have a potential market C. are popular among young adults D. will be improved by a new technology D Below is a selection from a popular science book. If blood is red, why are veins(静脉 ) blue? Actually, veins are not blue at all. They are more of a clear, yellowish colour. Although blood looks red when it39。 s outside the body, when it39。 s sitting in a vein near the surface of the skin, it39。 s more of a dark reddish purple colour. At the right depth, these blood－ filled veins reflect less red light than the surrounding skin, making them look blue by parison. Which works harder, your heart or your brain? That kind of depends on whether you39。 re busy thinking or busy exercising. Your heart works up to three times harder during exercise, and shifts enough blood over a lifetime to fill a supertanker. But, in the long run, your brain probably tips it, because even when you39。 re sitting still your brain is using twice as much energy as your heart, and it takes four to five times as much blood to feed it. Why do teeth fall out, and why don39。 t they grow back in grown－ ups? Baby(or“milk”) teeth do not last long。 they fall out to make room for bigger, stronger adult teeth later on. Adult teeth fall out when they bee damaged, decayed and infected by bacteria. Once this second set of teeth has grown in, you39。 re done. When they39。 re gone, they39。 re gone. This is because nature figures you39。 re set for life, and what controls regrowth of your teeth switches off. Do old people shrink as they age? Yes and no. Many people do get shorter as they age. But, when they do, it isn39。 t because they39。 re shrinking all over. They simply lose height as their spine(脊柱 ) bees shorter and more curved due to disuse and the effects of gravity(重力 ). Many(but not all) men and women do lose height as they get older. Men lose an average of 3－ 4 cm in height as they age, while women may lose 5 cm or more. If you live to be 200 years old, would you keep shrinking till you were, like 60 cm tall, like a little boy again? No, because old people don39。 t really shrink! It is not that they are growing backwards—their legs, arms and backbones getting shorter. When they do get shorter, it39。 s because the spine has shortened a little. Or, more often, bee more bent and curved. Why does spinning make you dizzy(眩晕的 )? Because your brain gets confused between what you39。 re seeing and what you39。 re feeling. The brain senses that you39。 re spinning using special gravity－ and－ motion－ sensing ans in your inner ear, which work together with your eyes to keep your vision and balance stable. But when you suddenly stop spinning the system goes out of control, and your brain thinks you39。 re moving while you39。 re not! Where do feelings and emotions e from? Mostly from an ancient part of the brain called the limbic system. All mammals have this brain area—from mice to dogs, cats, and humans. So all mammals feel basic emotions like fear, pain and pleasure. But since human feelings also involve other, newer bits of the brain, we feel more plex emotions than any other animal on the pla. If exercise wears you out, how can it be good for you? Because our bodies adapt to everything we do to them. And as far as your body is concerned, it39。 s “use it, or lose it”。 It39。 s not that exercise makes you healthy。 it39。 s more that a lack of exercise leaves your body weak and easily affected by disease. 32. What is the colour of blood in a vein near the surface of the skin? A. Blue. B. Light yellow. C. Dark reddish purple. D. Red. 33． Why do some old people look a little shrunken as they age? A. Because their spine is in active use. B. Because they are more easily affected by gravity. C. Because their spine bees more bent. D. Because they keep growing backwards. 34． Which of the。