试题与答案

“神舟六号”用动力燃料之一为氢化锂三兄弟——LiH、LiD、LiT。其中Li的质

来源：www.tikuol.com
题型：选择题

题目：

“神舟六号”用动力燃料之一为氢化锂三兄弟——LiH、LiD、LiT。其中Li的质量数为7，有关下列叙述中正确的是

A. 三种物质质子数之比为1:2:3            

B. 三种物质中子数之比为0:1:2

C. 三种物质的摩尔质量之比为4:5:6         

D. 三种物质核外电子数之比为1:1:1

答案：

答案：D

A. 错三种物质质子数之比为1:1:1

B.错 三种物质中子数之比为4:5:6

C.错 三种物质的摩尔质量之比为8:9:10

D. 对三种物质核外电子数之比等于质子数之比为1:1:1

考点：构成物质的粒子—分子、原子、离子元素周期律
试题推荐
题型：完形填空

第二节 选词填空（共8小题；每小题1分，满分8分）

从方框内选择适当的单词或短语用其正确形式填空

the first time , dream about, at an end , communicate with, think of, devote to, put up, fight for, suffer from, happen to

1. In the evening they _________________ their tent and began to eat.

2. Actually all languages change and develop when cultures meet and ______________________ each other.

3. He couldn’t eat much because he ___________________ stomachache.

4. My roommate _________________ have moved away so you can share the room with me.

5. I must warn you that my patience is almost _________________.

6. All his money ___________________ setting up some schools for poor children.

7. ________________ I saw her, I knew we would be good friends.

8. The people of the city, who _________ little ________ these events, were asleep as usual that night.
查看答案
微信公众账号搜索答案