问题 多选题

下列可以反映无脊椎动物与人类生活关系密切的例子有(  )

A.有的昆虫对农业有益,如瓢虫是蚜虫的克星,有的昆虫危害农业;

B.环节动物的蚯蚓可以改良土壤,有疏松泥土及增加耕地肥力的作用;

C.许多昆虫可以传播花粉,以保证农作物有好的收成;

D.可以为人类提供丰富的食品,如虾、蟹、海蜇等

答案

无脊椎动物在人们生活中的作用:可供人类食用、药用、观赏用,生产某些人类所需物质.与人类生活息息相关.有些动物是农业害虫的天敌,它们可以对害虫的数量起到一定的控制作用.如瓢虫是蚜虫的克星,赤眼蜂可以防治棉铃虫.当某些动物数量过多时,也会危害植物,如蚜虫吮吸汁液、蝗灾等;蚯蚓对人类的益处很多.蚯蚓在土壤里活动,使土壤疏松,空气和水分可以更多地深入土中,有利于植物生长,能够起到改良土壤的作用.蚯蚓能够提高土壤的肥力,蚯蚓吃进的腐烂有机物和大量土粒,经过消化形成粪便排出体外,其中含有丰富的氮,磷,钾等养分;自然界中的动物和植物在长期生存与发展的过程中,形成相互适应、相互依存的关系.动物能够帮助植物传粉如昆虫在采食花蜜的同时,身上会不知不觉地粘上花粉,飞落在同种植物的另一朵花的柱头上,就完成了传粉,使这些植物顺利地繁殖后代.动物能够帮助植物传播果实和种子,如苍耳果实表面的钩刺挂在动物的皮毛上,有利于扩大植物的分布范围.综上所述,四个选项都正确

故选:A、B、C、D

完形填空
完形填空 (10分)
Grandma was busy cooking in the kitchen and Sera was always to be here for dinner.
There were many photographs of past and present  1  members and many other old things on her grandma’s table. Among them, she especially loved the large clay pot (陶壶). It was beautiful, painted in many colours.
“May I hold it?” asked Sera.
“Yes, but please be  2 . It is very old.” Grandma picked up the pot with gentle hands, gave it to Sera, and then went into the kitchen.
Sera decided to sit on the sofa. The sofa was a few feet  3  her. She went backward.  4  a toy truck was there. The truck rolled (滚动) away when Sera stepped on it. She fell back onto the sofa. The clay pot  5  out of her hands and up into the air! It landed on the floor.
Sera could hear the clay crack (裂痕). “No, no!” she cried. She heard grandma’s footsteps coming toward her. How could she face her grandma now?
“It’s not so  6 , Sera,” Grandma said. “Come on. You can repair the pot.”
“Let me tell you a story about that pot.”
Grandma pointed to another crack in the pot. Sera had never  7  it before. “My grandma made this crack when she was about your age,” said grandma. “She was carrying it back to the village  8  it fell onto the road. It had been full of  9 , so she got all wet!” She pointed to another crack. “This crack came when I dropped the pot on a big boat that brought  10  here from Canada,” said grandma smiling. Sera laughed and held up the pot. She could see now how each crack had become part of the colourful design--and part of her family’s story.
小题1:
A.schoolB.familyC.teamD.village
小题2:
A.helpfulB.usefulC.carefulD.peaceful
小题3:
A.behindB.besideC.underD.above
小题4:
A.SuddenlyB.AmazinglyC.UnluckilyD.Surprisingly
小题5:
A.pickedB.threwC.droppedD.flew
小题6:
A.badB.safeC.lateD.easy
小题7:
A.knownB.watchedC.heard D.noticed
小题8:
A.whenB.untilC.ifD.unless
小题9:
A.sandB.waterC.saltD.sugar
小题10:
A.weB.ourC.usD.ours
填空题