课时作业（八）UNIT 8 Period 3 Lesson 2 & Lesson 3—Comprehending-【状元桥·优质课堂】2023-2024学年新教材高中英语必修第三册（北师大版2019）

课时作业（八）UNIT8 答案解析Pw Period Three Lesson2&Lesson3-Comprehending(张时：4o分钟) I.阅读 Kangaroo rats 凡 These pocket-size animals in the US Midwest Thorny devils,rattlesnakes,kangaroo rats and plains never drink water.They spend 75 percent of more have developed smart ways for surviving in their time in underground holes to avoid the heat in water-scarce(缺水的)environments. the desert.They survive on a diet of dry grass seeds. Thorny devils which they first bury underground.Because the underground In Australian deserts live some animals known soil is wetter than the surface soil,stored seeds may as thorny devils.These animals specialize in eating absorb as much as 30 percent more water than ones ants.which are also where they get their water. above ground.So when the rats eat their seeds,they But when ants are scarce.or conditions are even get both food and water. drier than normal,they have a backup.All they have 1.Where do Namib desert beetles live? to do is to kick the sand up onto their backs and let A.In Australian deserts. the network of tiny canals()on their skins to B.In the US Midwest plains. catch small amounts of water and guide the liquid C.In southwestern Africa. directly to their mouth. D.In Canada's Rocky Mountains Namib desert beetles 2.What is unique about kangaroo rats? An ocean away in southwestern Africa,the A.They drink underground water. Namib desert beetles pull off a similar trick.They B.They bury their backs to get water. use their backs as a cooler to catch water trapped in C.They don't need water to survive. the morning fog.As the droplets grow in size.they D.They just use their food to gather water. run down the insects'backs toward their mouths. 3.Which may have a better chance of surviving in Desert rattlesnakes food-scarce environments? Desert rattlesnakes of the western US are able A.Thorny devils. to live on just one hearty meal a year.But without a B.Desert rattlesnakes. drink of water now and then,the snakes would dry C.Kangaroo rats. up and b