科学常识2
Authored by LING Moe
Science
3rd Grade
Used 2+ times
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50 questions
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1.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
哪些是独居动物？
2.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
大象群居的目的是什么？
3.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
哪项说明了生物之间竞争的重要性？
4.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
这是自行车。请问它应用了哪些简单机械原理？（答案超过一个）
杠杆
斜面
轮轴
齿轮
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
下面资料显示电路L的说明。
。两个干电池、一个开关和四个灯泡
。四个灯泡的亮度相同
。灯泡具最高亮度
A
B
C
D
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
图11显示婉君所进行的一项实验。实验结果显示玻璃管的红色墨汁向下移动。哪项正确地解释实验的结果？
红色墨汁遇冷收缩
烧瓶里的空气遇冷收缩
红色墨汁吸收玻璃管外的空气
红色墨汁的体积增加
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
图15显示被放置在试管里的一枚铁钉。一个星期后，铁钉生锈了。F是什么？
小石子
干氯化钙
干棉花
剪碎的绿叶
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