问题 选择题

制作人口腔上皮细胞的临时装片时,取材时取的位置、用于载玻片上滴加的液体、染色用的液体分别是(    )

A.口腔内侧、碘液、生理盐水

B.口腔外侧、碘液、生理盐水

C.口腔外侧、自来水、碘液

D.口腔内侧、生理盐水、碘液

答案

答案:D

题目分析:制作口腔上皮细胞临时装片的正确顺序是:用纱布将载玻片和盖玻片擦拭干净,放在实验台上备用;滴一滴生理盐水在载玻片中央,目的是维持口腔上皮细胞的原有形状;用凉开水漱口,以去除口腔中的食物残渣;用消毒的牙签在口腔侧壁上轻轻刮几下,取得口腔上皮细胞,再在把牙签附有碎屑的一端在载玻片的生理盐水滴中均匀涂抹;盖上盖玻片,先用镊子夹起盖玻片的一边,让另一边先接触载玻片上的生理盐水滴;然后轻轻盖上,避免出现气泡;染是指染色,把稀碘液滴在盖玻片的一侧,用吸水纸从另一侧吸引,直到染液浸润到标本的全部.因此制作人口腔上皮细胞的临时装片时,用于漱口的液体、载玻片上滴加的液体、染色用的液体分别是凉开水、生理盐水、碘液.

故选D

考点:制作临时装片观察人的口腔上皮细胞。

阅读理解

 阅读下面的短文,按要求完成短文后的题目。

     One day an Australian farmer, Joe, saw a bright light in the sky. 1 The light came nearer and nearer

and suddenly Joe saw that it was a spaceship .The spaceship landed in a field quickly.

     The door of the spaceship opened and two strange beings climbed out. 2 They seemed to be half man

and half bird. Joe was afraid of them. He tried to run away. But the spacemen walked towards him,

picked him up and carried him into the spaceship. They put wires( 电线) from a machine onto his head

and they could speak to him in English.

     They asked him some questions about the earth. "We are from Venus," they said, "but it's getting very

hot there .A lot of our people are dying and we don't have much time left. We are trying to find a new

home."

     After some time they 3 freed Joe and  at last the spaceship took off  and could not be seen again. Joe

told his friends about the spaceship, but no one believed his story.

     "You'll believe me one day," Joe told them. "The spaceman will come back…"

1. 翻译1 处画线部分的句子。

    _____________________________________________________

2. 不变句意,改写2 处句子。

    _____________________________________________________

3. According to the conversation between Joe and the aliens, what do we know about Venus?

    _____________________________________________________

4. 3处单词的意思是___________.  

A. let …go  

B. paid no money  

C. took away  

D. locked

5. 用文中的两个词填空。

(1) Some people ________ in everlasting life after death.

(2) The girls are ________ of going out at night.

单项选择题