1. 以下哪个不是水在生活中的重要性?

科学线上测验 (第一章)

Quiz
•
Science
•
8th Grade
•
Medium
wee chewteng
Used 11+ times
FREE Resource
18 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
水是组成生命体的基本结构
水是水灾形成的主要原因
水是一些生物的住所
水时生物生存的基本条件
2.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
纯水的沸点是______℃,冰点则是______℃。
100,0
0,100
100,200
200,100
3.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
纯水在室温下呈现______,并且______。
固态,无色无味
液态,无色无味
气态,无色无味
以上皆有可能
4.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
一个水分子由两个______和一个______组成
氧原子,氢分子
氢原子,氧原子
氢分子,氧分子
氧原子,氢原子
5.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
检验氢气的方式是______。
能使到燃烧的木支熄灭
能使到余烬的木支复燃
能使到燃烧的木支发出“碰”的声响
能使到澄清石灰水变得浑浊
6.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
检验氧气的方式是______。
能使到燃烧的木支熄灭
能使到余烬的木支复燃
能使到燃烧的木支发出“碰”的声响
能使到澄清石灰水变得浑浊
7.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
电解时,氢气与氧气的比例是______。
1:2
2:1
1:3
3:1
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