问题 选择题

正确的实验操作是实验成功的保证,下列实验操作正确的是(  )

A.

称取氯化钠固体

B.

检验装置气密性

C.

过滤粗盐水

D.

点燃酒精灯

答案

A、药品和砝码放反了因此A答案不正确;

B、检查装置气密性的方法一般为:连接好装置,将导管的另一端伸入水中,用手捂住试管看是否出现气泡,因此B答案正确;

C、过滤操作中应注意一贴二低三靠,答案C中没用玻璃棒导流、漏斗下端没有靠在烧杯的内壁上,因此C答案不正确;

D、用燃着的酒精灯去引燃另一盏酒精灯,因此D答案也不正确.

故选B.

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.

填空题