问题 实验题

(3分)图4表示各种生物之间的关系,请据图回答:

(1)作为生态系统,图中还缺少了            部分。

(2)图中细菌、真菌是生态系统中的             

(3)写出图中的食物链:                         

答案

(1)非生物  (2)分解者   (3)树→虫→鸟

生态系统的组成包括生物成分和非生物成分,图中只有生物成分,细菌、真菌是生态系统中的分解者,通过分解作用将动植物的尸体及腐烂物质分解,释放的二氧化碳进入大气,食物链要按照“吃和被吃”的关系将被吃的生物排在前面,吃它的动物排在后面,并在它们之间画上箭头,箭头必须指向后面的动物。

阅读理解

阅读短文,回答问题。

       When they go to the new supermarket, all the housewives (家庭主妇) have one great wish: to be the lucky

customer so that they needn't pay for their shopping. For some weeks, Mrs Edward hopes, like many of her

friends, to be the lucky customer. Unlike her friends, she never gives up (放弃). The cupboards (碗橱) in her

kitchen are full of things which she doesn't need, Her husband (丈夫) persuades (劝说) her to stop buying

things that she doesn't need, but it is of no use. She dreams (梦想) that her lucky day is coming. 

      One Friday afternoon, after she finishes her shopping and is taking the things to her car, she finds that she

forgets to buy some tea. She goes back to the supermarket, gets the tea and goes to the cashier (收银台). She

sees the manager (经理) come up to her. "Madam," he says, holding (伸出) out his hand. "I want to congratulate

you! You are our lucky customer and everything you have in your basket is free."

1. The customer in the supermarket ________. [ ]

A. wants to go around the supermarket.

B. doesn't have to pay for shopping.

C. wishes to know what to buy.

D. could get free things if she / he is lucky.

2. "customer" means (意思) in Chinese (中文) ________. [ ]

A. 收银员

B. 售货员

C. 顾客

D. 上帝

3. Mrs Edward husband ________ things which she is not in need of. [ ]

A. likes his wife buying

B. enjoys her being the lucky customer

C. can't stop her from buying

D. would like her to buy

4. Mrs Edward gets her free things ________. [ ]

A. on Sundays

B. in the evening

C. on Friday

D. with her husband

5. The main purpose (主要目的) of the passage (短文) is to tell us not to ________. [ ]

A. do shopping at a new supermarket.

B. go back to the supermarket after you leave it

C. go shopping on Friday, because some people think it is an unlucky day.

D. dream of getting lots of things free at any shop

单项选择题