第二十四套英语7 Jnits12(A卷)听力1~5 BCBCA 6~10 ACBAA 11~15 ACBCA 16~20 BCACB阅读理解科学家通过实验发现,深度睡眠有助于预防阿尔茨海默病。21.D根据第2段第1句可知,深度睡眠时,3-淀粉样蛋白和tau蛋白会减少。22.D根据第4段最后两句可知,研究结果表明,睡眠较浅的人容易产生更多的β淀粉样蛋白。结合第2段第1句可知,阝淀粉样蛋白是阿尔茨海默病的生物标志物。所以深度睡眠有助于降低患阿尔茨海默病的概率。23.A根据文章最后一句可知,tau蛋白产生一种有害物质,引发阿尔茨海默病。24.B通读全文可知,科学家发现深度睡眠可以帮助预防阿尔茨海默病。语法填空25.an 26.who 27.insects 28.to put 29.devoted 30.original 31.is estimated 32.As33.twentieth 34.most expensive附:听力部分录音材料(Text 1)W:It's 7:40 now.We've waited here for about ten minutes.M:Oh,our bus is late today.W:Yes,it should have arrived five minutes ago.(Text 2)M:How's your nephew Peter doing?W:Oh,he's fine.He just had a birthday,and...yeah,he turned nine last month.(Text 3)W:Hi,Buzz.Oh,you're injured.What happened?M:After withdrawing some money in the bank,I was going to the supermarket to buy some-thing for Marley when I fell off my bike.You know,she is in hospital these days.(Text 4)M:Miss,is there still time for a cup of coffee on the flight?W:Yes,but you have to drink it fast,because we'll be landing in 10 minutes.(Text 5)W:I really hate insects.They're so annoying.M:But I think differently.Many animals eat insects.If there are no insects,bigger animalswill have nothing to eat.Without insects,plants couldn't exist.Also,people couldn'tgrow crops without insects.在·66:【23·G3AB·英语·参考答案一R一必考一N】