北师大版高三英语课后习题含答案限时规范练46选修8Unit23B.docx

1、北师大版高三英语课后习题含答案限时规范练46选修8Unit23B限时规范练46(选修8Unit 23B)核心素养关键词:培养学生人与自然、保护动物的思维意识限时规范练第92页一、阅读理解AWhat do you usually do when a flying insect lands on your arm? Most likely you blow it away.But what if that bug were a ladybug (瓢虫)? Then chances are you would let it stay.What is it about ladybugs that we

2、 like?Farmers once thought ladybugs were a good luck sign.A ladybug in the field meant that the crops would be successful and the weather would be good.The farmers may have been exaggerating (夸大) about what a very small bug can do,but in fact ladybugs do help out with the crops.They eat harmful inse

3、cts.Actually,it is not the adult ladybug that eats the other insects.Its the ladybug larvae (幼虫).Ladybugs lay their eggs on leaves that are covered with aphids or other insects.When the larvae come out of the eggs,they are very hungry and will eat mites,aphids,mealybugs,green flies,and other crop-de

4、stroyers.A single ladybug larva can eat over 1,000 aphids in one day.In the 1800s,ladybugs were brought all the way from Australia to California and set free among orange trees that were dying from being eaten by insects.The little red and black “eating machines” completely saved all the trees.Ladyb

5、ugs go about their daily business without worrying much about anything.Very few birds or insects will eat a ladybug because it gives off something that is dangerous to eat.Ladybugs also protect themselves by playing dead.They fall off leaves and remain very still until their enemy goes away.So next

6、time you see a ladybug,think about what it may be up to.Maybe it is off to save an orange tree.Maybe its next move will be to fall off a leaf and play dead or stand up to a bird about 100 times its size.Maybe its letting you know that the weather will be good tomorrow.Who knows? Ladybugs are special

7、 that way.【篇章导读】本文是说明文。文章是对瓢虫的先容。瓢虫是一种可以吃害虫的虫豸,它们对于庄稼来说是得力的助手。1.What do we know about mites and aphids?A.They do harm to the crops.B.They eat more than they should.C.They are food for adult ladybugs.D.They are the enemy of ladybug larvae.答案A剖析推理判断题。由第三段中的“they are very hungry and will eat mites,aphi

8、ds,mealybugs,green flies,and other crop-destroyers”可知,这些都是对庄稼有害的虫子。2.Why were ladybugs brought from Australia to California in the 1800s?A.To save orange trees.B.To do research on them.C.To increase their number.D.To report the weather for farmers.答案A剖析细节明白题。由第四段中的“ladybugs were brought.set free amo

9、ng orange trees that were dying from being eaten by insects”可知,19世纪瓢虫被从澳大利亚引进到美国加利福尼亚州是为了挽救被害虫陵犯的橘子树。3.What does the underlined part “stand up to” in the last paragraph probably mean?A.Play with.B.Worry about.C.Get along with.D.Fight back against.答案D剖析词义预测题。由倒数第二段中的“Very few birds or insects will ea

10、t a ladybug because it gives off something that is dangerous to eat.”可知,很少有鸟或虫豸吃瓢虫。再由画线部分后的“a bird about 100 times its size”可知,当遇见比它大的鸟时,瓢虫会释放某种物质从而对鸟造成威胁。故此处的stand up to有“回击,抵御”之意。4.What does the author think of the ladybug?A.It is a crop-destroyer.B.It is a good luck sign.C.It is a little flying h

11、elper.D.It is a big eating machine.答案C剖析推理判断题。本文旨在介绍瓢虫这种可以吃害虫的虫豸,它们对于庄稼来说是得力的助手,故C项中的helper最切合瓢虫的这一特性。BTwo books have been developed to help designers,developers and homeowners make it easier and safer for the blind to find their way to,into and through buildings and large public spaces.The books we

12、re created by the Cooperative Research Centre for Construction Innovation (建筑创新),a programme which helps solve the problem of finding ways around buildings and public spaces.Construction Innovation CEO Keith Hampson says any wayfinding system is more than just signs.“It includes buildings,inside des

13、ign and lighting,” Keith says.He says people having problems with their eyesight use these communicative signs to make moving around spaces easier.For example,a good sign may include tactile (可感触到的) lettering Braille and a tactile ground surface.The project won the 2007 Disability Action Week Award

14、for Building Accessible Housing and Environments.“The project has received increased national attention since the award last year,” Keith says.“Most importantly however,we have helped to raise the awareness and need for a wayfinding system across the building and construction industry.”The Departmen

15、t of Public Works was a key member in the project.Team leader Ron Apelt says people with eyesight problems are often forgotten in the planning and design of buildings and public open spaces.“Our books are mainly for new buildings and the immediate spaces surrounding these buildings,” Ron says.“Howev

16、er,the books can also be used for any plans for old buildings and improving wayfinding around places such as universities,hospitals and schools.”“They can also be used in busy spaces like shopping centres as the design ideas remain unchanged no matter what the spaces and places are like.”【篇章导读】本文是说明文。文章介绍了一项帮助盲人识别道路、进出大楼和公开场合等的项目。5.What are the books mentioned in the text about?A.How