
补习 初二下册 第4章

Quiz
•
Science
•
7th Grade
•
Medium
Sheng Hao Tan
Used 491+ times
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17 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
45 sec • 5 pts
下图显示空气中各成分的含量。以下哪一个可以是物质O?
I 氮气 II 氢气 III 氧气 IV 氩气 V 二氧化碳
I,II,III
II,III,IV
II,IV,V
I,IV,V
2.
MULTIPLE CHOICE QUESTION
45 sec • 5 pts
下列哪一个现象不能证明空气中有水蒸气?
冰冻奶茶杯的外壁上出现水珠
松脆的饼干曝露在空气变得不脆
寒冷的早晨,汽车的表面有许多小水滴
炎热的午后,当风吹过皮肤感觉一阵凉快
3.
MULTIPLE CHOICE QUESTION
45 sec • 5 pts
以下都是氮气的用途,除了
制成霓虹灯
制成化肥和炸药
冷藏人体细胞组织
充入灯泡,保护灯丝
4.
MULTIPLE CHOICE QUESTION
45 sec • 5 pts
以下气体和其用途的配对,哪个是正确的?
A
B
C
D
5.
MULTIPLE CHOICE QUESTION
45 sec • 5 pts
下列哪一种气体在空气中所占的百分率最小?
氦
氧
氮
二氧化碳
6.
MULTIPLE CHOICE QUESTION
45 sec • 5 pts
下列哪些有关空气及其成分的叙述是正确的?
I.空气是混合物
II.在低温高压时,氧气可被液化成淡蓝色液体
III.氮气是制造肥料的原料
IV.稀有气体化学性质不活泼,因此对人类而言其用途极少
II、IV
I、II、III
I、III、IV
I、II、III、 IV
7.
MULTIPLE CHOICE QUESTION
45 sec • 5 pts
下列哪项有关稀有气体的叙述是正确的?
氡气可致癌
氙气不与其他物质起化学反应
稀有气体可冲淡空气中的氧气
稀有气体是制作化学肥料的主要元素
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