问题 读图填空题

下图是鲫鱼的形态图,根据图示回答问题:

(1)在观察活体鲫鱼时,最好能按照一定的顺序逐项进行,以下_____的观察顺序进行会比较好呢?

A.体形——鱼鳍——鱼鳞——鱼鳃

B.鱼鳍——体形——鱼鳞——鱼鳃

C.鱼鳞——鱼鳍——体形——鱼鳃

D.鱼鳃——鱼鳍——鱼鳞——体形

(2)与鱼体形最相似的是______。

A.三角形 B.圆形   

C.菱形 D.长方形

(3)在鱼鳃向体侧后方喷水的一瞬间,为保持鱼的静止状态,此时的胸鳍是否需要运动?______________________________________________。

答案

(1)A

(2)C 

(3)由于喷水瞬间形成向后动力,对鱼体有向前推动的作用;为保持鱼体的静止状态,胸鳍应不停地摆动。

阅读理解
阅读理解。
       News 1: A gas explosion (瓦斯爆炸) happened on October 20 in a coal mine (煤矿) in Daping, Henan.
It has killed 129 people so far. Another 19 are still missing. More than 400 workers were at the mine at the
time. Only 298 ran out.
       News 2: Scientists have found some caves (洞穴) in the north part of the Mogao Grottoes (莫高窟)
of Dunhuang in Gansu. Now the north part has 248 caves in all. Altogether there are 735 Dunhuang Mogao
Grottoes. People began to make Mogao Grottoes from 366 AD. Pictures in the caves show what people's
lives were like in the past.
       New 3: Are girls cleverer than boys? Maybe. In a new study, scientists found that female chimps used
sticks two years earlier than male chimps in Africa. Female chimps watched their mums look for food. The
males climbed trees. The same thing also happens in the world of people. Girls learn to write and draw before
boys, while boys learn to play with balls before girls.
1. Which of the above news stories talks about an accident?
[ ]
A. News 1
B. News 2
C. News 3
D. All of them
2. We can tell from the Mogao Grottoes pictures _______.
[ ]
A. there are many caves in China
B. how to live a happy life
C. how people lived long ago
D. caves should be protected
3. The reporter of News 3 is _______ that girls are cleverer than boys.
[ ]
A. very sure
B. doubtful (怀疑的)
C. sure
D. not sure
4. Which of the following statements is true?
[ ]
A. More than 400 workers lived through the mine explosion.
B. Female chimps don't like to learn things from their mums.
C. Boys learn to play with balls earlier than girls.
D. All caves in China have pictures on the walls.
5. "Chimp" in the last news story probably is _______.
[ ]
A. a kind of food
B. a kind of animal
C. the name of a man
D. the name of a game
问答题 简答题