1.1 生命离不开水
Quiz
•
Biology
•
12th Grade
•
Practice Problem
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Medium
Henry You
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5 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
以下是水对人体的重要性,除了
水能帮助身体产生分泌物如消化酶
植物淀粉的水解(一种分解作用)需要水分子的参与
汗液和尿液的产生有助于降低体温
水分子是形成糖类分子的重要成分
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
食盐容易溶于水,主要是因为水分子的何种特性?
分子小
有极性
具有电子
具有共价键
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
生物体含水量高,有助于调节生物体自身的温度,避免高温对生物体造成伤害。其主要原因是什么?
水是生命的摇篮,对维持生物的正常代谢具有重要作用
水是极性分子,氨基酸、蛋白质、糖等物质都容易溶于水
水结成冰后,浮在水面有利于保护水下的生物
水含有氢键,使得水具有较大的比热容量
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
水分子是极性分子,所以水分子之间的连接是何种化学键?
氢键
共价键
离子键
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
A
B
C
D
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