
5上自然3-3南一
Quiz
•
Science
•
5th Grade
•
Practice Problem
•
Medium
鄭紀菁 鄭紀菁
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50 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
使用發光二極體測試水溶液的導電性時,發光二極體的長腳要與電池的正極相接,發光二極體的短腳要與電池的負極相接。
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
所有物質溶於水中後,都可以導電。
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
只有鹼性的水溶液才容易導電。
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
滴入紫色高麗菜汁後不會變色的水溶液都是好的導電物,例如:砂糖水。
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
生活中有些水溶液不容易導電,例如:砂糖水。
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
發光二極體具有體積小、用電省、壽命長等優點,近年來被廣泛應用在各種電器產品上。
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
食鹽水溶液和砂糖水溶液都會導電。
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