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1、2024黄冈八模四
2、黄冈八模2024测试卷四
3、黄冈八模2024高三试卷数学四
4、黄冈八模答案大全2024英语四
5、2024黄冈八模
6、2024年黄冈八模
7、黄冈八模2024高三
8、黄冈八模2024模拟测试卷高三
9、黄冈八模2024高三模拟测试卷一
10、黄冈八模2024高三试卷二英语

30.What is paragraph 4 mainly about?A.The importance of happiness.B.The differences among happy nations.C.The ways to promote happiness.D.The impact of culture on happiness.31.What does the underlined word "takeaway"in the last paragraph probably mean?A.Message.B.Method.C.Reason.D.Result.DIn times of intense stress,people sometimes let it out with a scream and a new studysuggests that plants might do the same.Researchers at Tel Aviv University in Israel hasfound that plants let out ultrasonic(screams when damaged or stressed by drought.The noises,falling within a range of 20 to 100 kilohertz,are too high-frequency forhumans to hear,but other plants and some animals perceive them.Insects might belistening for sounds from stressed plants to assess their condition before laying eggs ontheir leaves.A moth()may decide against laying eggs on a plant that soundswater-stressed.Researchers attached recording devices directly to plants to listen for secret soundsinside their stems().In drought,air bubbles formed,burst and caused vibrations(within the tissue that normally carries water up the plants'stems.The process was pickedup by the attached recording devices,but researchers wanted to know if any plant soundscould travel through the air.So the team placed microphones 10 centimetres from stressed-out tomato and tobaccoplants.They subjected one set of crops to drought and another to physical damage.A thirdgroup was untouched.The microphones did pick up distinct sounds.On average,drought-stressed tomatoplants let out about 35 ultrasonic screams per hour,while those with cut stems made about25.Drought-stressed tobacco plants let out about 11 screams per hour,and cut crops madeabout 15 sounds in the same time.The average number of sounds from untouched plantsfell below one per hour.The researchers also attempted to identify each plant group just based on its screams.Using a type of artificial intelligence calculations,the team picked out distinct features ineach set of sounds and successfully sorted their plants into three kinds:"dry,cut oruntouched.”If it is not too costly to set up the recording in a field situation,farmers might be ableto hear these stress signals too.In future,enabling farmers to listen for water-stressedplants could "open a new direction",which will be increasingly important as climatechange exposes more areas to drought.高二期末检测英语试题卷第7页（共12页)