问题 选择题

两栖动物不能完全适应陆地生活的主要原因是(  )

A.肺不发达

B.体温不恒定

C.生殖发育离不开水

D.心脏结构简单

答案

青蛙属于两栖动物,经过抱对后,分别把生殖细胞排在水中,在水中结合形成受精卵,发育过程经过受精卵、蝌蚪、幼蛙、成蛙,幼体生活在水中,用鳃呼吸,用鳍游泳,成蛙即能生活在水中,也能生活在潮湿的陆地上,用肺呼吸,皮肤辅助呼吸,幼体与成蛙在外部形态和生活习性上变化明显,为变态发育,可见两栖动物的生殖和发育都离不开水.因此,两栖动物不能完全在陆地生活的原因是生殖和发育都离不开水.
故选:C

填空题
阅读理解

阅读理解。

     Last week my youngest son and I visited my father at his new home in Tucson, Arizona. He moved there

a few years ago, and I was eager to see his now place and meet his friends. My earliest memories of my father

are of a tall, handsome, successful man devoted to his work and family, but uncomfortable with his children.

As a child I loved him; as a school girl and young adult (成年人) I feared him and felt bitter about him. He

seemed unhappy with me unless I got straight A's and unhappy with my boyfriends if their fathers were not

as "successful" as he was. Whenever I went out with him on weekends, I used to struggle to think up things

to say, feeling on guard.

     On the first day of my visit, we went out with one of my father's friends for lunch at an outdoor cafe. We

walked along that afternoon, did some shopping, ate on the street table, and laughed over my son's funny facial

expressions. Gone was my father's critical (挑剔的) air and strict rules. Who was this person I knew as my

father, who seemed so friendly and interesting to be around? What had held him back before?

     The next day, my dad pulled out his childhood pictures and told me quite a few stories about his own

childhood. Although our times together became easier over the years, I never felt closer to him at that moment

. After so many years, I'm at last seeing another side of my father. And in so doing, I'm delighted with my new

friend. My dad, in his new home in Arizona, is back to me from where he was.

1. Why did the author feel bitter about her father as a young adult? [ ]

A. He expected too much of her.

B. He was too proud of himself.

C. He did not love his children.

D. He was silent most of the time.

2. When the author went out with her father on weekends, she would feel _____.[ ]

A. safe

B. sorry

C. tired

D. nervous

3. What does the author think of her father after her visit to Tucson? [ ]

A. Strict and hard-working.

B. More talkative.

C. Gentle and friendly.

D. More critical.

4. The underlined words "my new friend" in the last paragraph refer to _____. [ ]

A. the cafe owner

B. the author's father

C. the friend of the author's father

D. the author's son