问题 选择题

蚯蚓身体表面生有许多刚毛,其作用是(  )

A.协助运动

B.刺杀小动物

C.抵抗敌害

D.减少运动时的阻力

答案

蚯蚓属于环节动物,没有骨骼,蚯蚓的运动是依靠纵、环肌的交互舒缩及体表的刚毛的配合而完成的.当蚯蚓前进时,身体后部的刚毛固定不动,这时环肌收缩,纵肌舒张,身体就向前伸,接着身体前端的刚毛固定不动,这时纵肌收缩、环肌舒张,身体向前缩短而前进.收缩舒张交替进行,从而使蚯蚓向前蠕动.所以蚯蚓身体腹部刚毛的作用是与周围粗糙表面接触,与肌肉协调完成运动.

故选A.

完形填空

阅读下面短文并回答问题,然后将答案写到答题卡相应的位置上(请注意问题后的词数要求)。

[l] We expect companies selling products to make them as available as possible. But now some of them are bringing back rationing(定量供应). As you might expect, it's all part of a plan to make us spend more, not less.

[2]Butter, bacon, sugar, tea and meat were rationed in Britain during World War II, because goods at that time were scarce, and hard to get for all. But nowadays industrial mass production           . Factories all over the world are pumping out bright and beautiful objects.

[3]When everyone has to wait and save up for new things, owning them feels exciting and special. But when lovely things are available every day, they stop being a treat. The other characteristic of consumer society is that we aim for social distinction through what we own. But if everyone has lots of things, how can we impress anyone with our purchases? All of this takes the fun out of shopping and means there's a limit to how much consumerism can grow.

[4] This is deeply worrying to companies, and some of them have started to fight it, by creating artificial scarcity(短缺). For example, Swedish rapper Adam Tensta has limited access to his latest track. Only one person at a time can access it, and fans must take their place in a digital queue.

[5] This hend means we can again own something rare. But the risk for these companies is that in a world of so many things, if they make their products too hard to get, we'll just buy from someone else instead.

小题1:What is the text mainly about? (no more than 3 words)

                                                                               

小题2:Fill in the blank in Paragraph 2 with proper words. (no more than 5 words)

                                                                               

小题3:In which paragraph can the following sentences be put as an example?

In Singapore, a small cafe called Liberty Coffee only opens on random days. It sometimes stays closed for over a week at a time.

                                                                               

小题4:What are the two characteristics of consumer society? (no more than 15 words)

                                                                           

                                                                           

小题5:What is the risk for the companies creating artificial scarcity ? (no more than l0 words)

                                                                              

单项选择题