问题 填空题

右图是菜粉蝶发育过程中的四个时期的示意图:请分析回答:

(1)、图中数字代码1是______,2是______,3是______,4是______.

(2)、菜粉蝶的发育顺序是:______→______→______→______ (填数字代码).

(3)、与菜粉蝶相比,蝗虫发育不经过的时期是______ (填数字代码)

答案

完全变态发育,昆虫在个体发育中,经过卵、幼虫、蛹和成虫等4个时期的叫完全变态发育.完全变态发育的幼虫与成虫在形态构造和生活习性上明显不同,差异很大.如蝶、蚊、蝇、菜粉蝶、蜜蜂,蚕等.

(1)、新生命的开始是从受精卵开始的,因此图中数字代码1是成虫,有两对翅;2是不食不动的蛹;3是受精卵,4 是幼虫,运动方式是爬行.

(2)、菜粉蝶的幼虫与成虫在形态构造和生活习性上明显不同,差异很大.属于完全变态发育,在个体发育中,经过3卵→4幼虫→2蛹→1成虫等4个时期发育,顺序是:3→4→2→1

(3)、与菜粉蝶相比,蝗虫发育是不完全变态发育:幼体与成体的形态结构和生活习性非常相似,但各方面未发育成熟,发育经历卵、若虫、成虫三个时期.因此蝗虫发育不经过的时期2蛹期.

故答案为:

(1)成虫;蛹;受精卵;幼虫;     

(2)、3→4→2→1;

(3)2.

阅读理解

     Once upon a time, there was a little weasel (鼬鼠). His name was Horace. Unlike all the other

weasels, Horace was very bookish.

     He had a copy of The Little Prince that he had found out behind a chicken house. The third chapter

of the book was missing and the back cover was broken, but it was the only book he had, and he loved

it. While all the other weasels spent their time playing, Horace would read instead. This made the other

weasels surprised, but they let it go by.

     Then, one day, the Earth was invaded (入侵) by space aliens. These aliens were a group of giant

librarians. Because they were librarians, they had of course done their research before they began their

invasion.     

     Meanwhile, the librarians went out to make contact with the species with whom they felt the most

affinity (密切关系). They had hoped that they could find the great works of weasel literature, but they

found that this was not so. The giant weasel librarian aliens were very disappointed. "Is there no weasel

at all who loves books as we do?" (Naturally, they had learned to speak the weasel language.) "No,"

said the weasels.

     At last, they came to the town where Horace lived. Here the weasels said "Yes!" They found Horace

and placed him in their libraries, where at last he got a complete edition of The Little Prince. He read it

every day for the rest of his life.

1. From the text we can infer that        .

A. Horace had a copy of The Little Prince

B. the space aliens looked much like weasels

C. the space aliens hate weasels

D. Horace and the space aliens had the same hobby

2. Which of the following is TRUE about Horace?

A. Horace liked playing with other weasels.

B. Horace got a book behind a chicken house.

C. Horace read the book when other weasels took a rest.

D. Horace lived in the town with the librarians.

3. According to the text, give the right order of the following events.

a. The space aliens found Horace and gave him a job as a librarian.

b. Horace had a copy of The Little Prince but it was broken.

c. The space aliens had done their research before they began their invasion.

d. The space aliens went to look for a weasel who loved reading books.

A. a, b, c, d  

B. b, a, c, d,  

C. b, c, d, a  

D. c, a, b, d

4. The underlined word "bookish" probably means "          ".

A. foolish  

B. fond of reading

C. childish    

D. selfish

5. The text above is a (n)        .

A. fairy tale  

B. scientific report

C. poem  

D. essay (随笔,小品文)

多项选择题