鲫鱼的口和鳃盖后缘,相互交替地张开和紧闭,这是鲫鱼在进行: A.摄食 B.排出食

题型:选择题

问题:

鲫鱼的口和鳃盖后缘,相互交替地张开和紧闭,这是鲫鱼在进行:

A.摄食

B.排出食物残渣

C.饮水

D.呼吸

考点:探究实验:鱼鳍在游泳中的作用动物的生活环境和生活习性动物的形态结构和功能
题型:选择题

A Narrow Escape

Shortly after the war, my brother and I were invited to spend a few days’ holiday with an uncle who had just returned from abroad. He had rented (租) a cottage in the country, although he hardly spent much time there. We understood the reason for this after our arrival: the cottage had no comfortable furniture in it. Many of the windows were broken and the roof leaked (漏水), Cwet.

On our first evening, we sat around the fire after supper listening to the stories our uncle told of his many adventures in distant countries. I was so tired after the long train journey that I would have preferred to go to bed; but I could not bear to miss any of my uncle’s exciting stories, He was just in the middle of describing a rather terrifying experience he had once had when there was a loud crash(倒塌声) from the bedroom above, the one where my brother and I were going to sleep.

When we got to the top of the stairs and opened the bedroom door, a strange sight met our eyes. A large part of the ceiling had fallen right on to the pillow(枕头)of my bed.

66. The uncle disliked the rented cottage for the reason that _____.

A. there were no beds in it

B. the windows were broken and the roof leaked

C. it was too old for him to live in

D. it was very rainy in the area

67. On the first evening, the writer was very sleepy, _____.

A. but he did his best not to miss any stories

B. so he had to go to bed early

C. because he was tired of his uncle’s stories

D. and he was gradually falling asleep while listening

68. A narrow escape means ___.

A. A person runs away from a danger through a narrow door.

B. A person escapes a danger by luck.

C. A person escapes a danger easily.

D. A person runs away from a danger easily.

题型:选择题

下述最能反映肾功能损害程度的是()

A.尿红细胞数

B.尿蛋白量

C.尿白细胞数

D.尿管型数

E.尿比重低且固定于1.010

题型:选择题

感染过程的五种表现在不同传染病中各有侧重,一般最常见的是()

A.显性感染

B.隐性感染

C.病原体被清除

D.潜伏性感染

E.病原携带状态

题型:选择题

驾驶机动车进入环岛时不用开启转向灯

题型:选择题

受激吸收

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