新疆沙雅县第二中学2019年高三高考（全国2卷）押题卷1英语试题

押题卷--英语1 （全国Ⅱ卷适用） 第1卷 [来源:Z+xx+k.Com] 评卷人 得分 [来源:Zxxk.Com] 一、阅读理解 1    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 designed to attract different insects who are natural enemies to the attackers.Once they arrive,the tables are turned.The attacker who was lunching now becomes lunch.[来源:学科网]     In st