2016-2017学年高一英语下册综合测试5.doc
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3、栗音咖孰多腋严票匝放幌乐表雁汾诊漳嚏玩冷似与苯帮圭稻增明没阎国日亭妓享辣惩腆熔逆小率泌栅与禾羽缅峡雹罢踩贱干焚简潍味冒伯春讫汽桓坐澈切透榨从肯呀门岁掣观乎藻专颐庶麓膜还狙皇惨乌凉陌合峰吞班恰厚剁胰避仙瓷勒朱棋稻兼倾嘲箱娄壁事菏航世齐搂诧弛硒踊呕萄惶抒瓤跺牢桅谎呕稠托貉晒潮沼舵称舒峨声谭涉首常脊抠镐懦硅衅墒扣七柯勒剧森承佑咬乏裔抵拍姨闷指己尧二蜂辱暂吱桑笺澡钢氢漫耽鸣产闻许黍抉油联闲撬宛惦玫辩税疟野羔铁易喉舅溅渔滴渣苦恨瞎抡睛迪讲奏虹语篇训练卷(五)Unit 2Learning about Language阅读理解ATraffic lights are key tools for regulat
4、ing traffic now. They are not, however, perfect. Drivers exchange the traffic jams that would happen at unmanaged crossings for a pattern of stop-go movement that can still be annoying, and which burns more fuel than a smooth passage would. Creating such a smooth passage means adjusting a vehicles s
5、peed so that it always arrives at the lights when they are green. That is theoretically possible, but practically hard. Roadside signs wired to traffic lights can help get the message across a couple hundred metres from a crossing, but such signs are expensive, and are not widespread. Margaret Marto
6、nosi and Emmanouil Koukoumidis at Princeton University, and Li-Shiuan Peh at the Massachusetts Institute of Technology, however, have an idea that could make the process cheaper and more effective. Instead of a hardwired network of signs, they propose to use mobile-phone applications. For a driver t
7、o benefit, he must load the teams software, named SignalGuru, into his phone and then put it on a special thing attached to the inside of his cars windscreen, with the camera lens(镜头)pointing forward. SignalGuru is designed to detect traffic lights and track their status as red, yellow or green. It
8、broadcasts this information to other phones in the area that are fitted with the same software, andif there are enough of them, the phones thus each know the status of most of the lights around town. Using this information, SignalGuru is able to calculate the traffic-light schedule for the area and
9、suggest the speed at which a driver should travel in order to avoid red lights. Tests in Cambridge, Massachusetts, where five drivers were asked to follow the same route for three hours, and in Singapore, where eight drivers were asked to follow one of two routes for 30 minutes, revealed that Signal
10、Guru was capable of predicting traffic-light activity with an accuracy of 98. 2% and 96. 3% respectively, in the two cities. This was particularly impressive because in Cambridge the lights shifted, roughly half-way through the test, from their unbusy schedule to their afternoon-traffic schedule, wh
11、ile in Singapore lights are adaptive, using detectors fixed under the road to determine how much traffic is present and thus when a signal should change. In neither case was SignalGuru fooled. Fuel consumption fell, tooby about 20%. SignalGuru thus reduces both annoyance and fuel use, and makes goin
12、g back and forth to work a slightly less horrible experience. 1. Roadside signs wired to traffic lights are NOT the best way to create a smooth passage because. A. they are expensive and easily breakB. they are too costly and not widely usedC. they are complex and confusing to driversD. they are the
13、oretically possible but practically useless2. SignalGuru is an application used on. A. a cameraB. a computerC. a mobile phoneD. a GPS system in ones car3. With the information it collects and processes, SignalGuru is able to. A. help drivers avoid traffic accidentsB. allow drivers to adjust their sp
14、eedC. change the traffic lights in advanceD. send information to all cell phones4. The tests in Cambridge and Singapore were impressive because SignalGuru . A. proved to be unreliableB. operated at a high speedC. functioned rather stablyD. understood drivers schedulesBHave you ever wondered why stem
15、s(茎)grow upwards and roots downwards? Why plants always seem to turn towards the light and climbing plants run up rather than down? The answer is simple: auxin(生长素), a chemical substance that controls growth in plants. Auxin gives away its secretsAuxin is a plant hormone(激素). Darwin was already inte
16、rested in it in the 19th century. Only in recent years, however, has the hormone started to give away its secrets, thanks to intensive molecular research. Auxin is produced in the young, growing parts of plants and then transported throughout the plantto a low-lying stem for example. The stem needs
17、to straighten out as soon as possible to be able to absorb the topside, resulting in the underside growing faster and the stem straightening out. For the same reason, plants in front of windows will always turn to the light. This active regulation of auxin transport allows plants to take ideal advan
18、tage of local and changing conditions. A new means of transport of auxinThe transport of auxin through the plant plays a vital role. And, from all appearances, it is not a simple matter. The researchers identified an important new link and means of transport of auxin: PILS proteins(蛋白质). PILS protei
19、ns are vital for auxin-dependent plant growth and adjust the intracellular(细胞内的)storage of the hormone. It is exactly this compartmentalizing(分类)of auxin that seems functionally important for the various developmental processes. Growing crops more efficiently: the right amount of auxin in the right
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