内蒙古巴彦淖尔市第一中学2017-2018学年高二上学期期中考试英语试题

巴市一中2017-2018学年第一学期期中考试 高二英语试题 试卷类型： A 出题人：秦罡频 说明：本试题分第I卷（选择题）和第II卷（非选择题），考试时间为100分钟，卷面总分为120分，第1卷答案应涂在答题卡上，考试完毕后，只交第II卷和答题卡。 第I卷（共 70 分） 第1部 分： 阅读理解（共两节，满分40分）[来源:学科网] 第1节 （共15小题；每小题2分，满分30分） 阅读下列短文，从每题所给的A、B、C和D四个选项中，选出最佳答案。 A When a leafy plant is under attack，it doesn’t sit quietly. Back in 1983, two scientists, Jack Schultz and Ian Baldwin, reported that young maple trees getting bitten by insects send out a particular smell that neighboring plants can get. These chemicals come from the injured parts of the plant and seem to be an alarm.What the plants pump through the air is a mixture of chemicals known as volatile organic compounds, VOCs for short. Scientists have found that all kinds of plants give out VOCs when being attacked. It’s a plant’s way of crying out. But is anyone listening? Apparently. Because we can watch the neighbours react. Some plants pump out smelly chemicals to keep insects away. But others do double duty .They pump out perfumes（芳香）desi