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自然L3-3

Authored by 李 韋賢

Science

5th Grade

Used 8+ times

自然L3-3
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13 questions

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1.

MULTIPLE CHOICE QUESTION

10 mins • 1 pt

在電路的測電實驗中,發現砂糖水不會使LED燈發光,這可以推論所有中性的水溶液都不會導電。(3分)

O

X

2.

MULTIPLE CHOICE QUESTION

10 mins • 1 pt

家用電的電壓比較高,如果手是潮溼的不要去拔電器的插頭,也不要去開電器的開關,避免觸電。(3分)

O

X

3.

MULTIPLE CHOICE QUESTION

10 mins • 1 pt

當電線、電池和燈泡連接成通路時,燈泡會發亮。(3分)

4.

MULTIPLE CHOICE QUESTION

10 mins • 1 pt

Media Image

測試水溶液導電性時,直接利用插座送來的電力既方便又安全。(3分)

5.

MULTIPLE CHOICE QUESTION

10 mins • 1 pt

Media Image

直接利用眼睛觀察水溶液的導電性是最準確的。(3分)

6.

MULTIPLE CHOICE QUESTION

10 mins • 1 pt

Media Image

發光二極體又稱「 」?(3分)

LET

LED

LEE

LDD

7.

MULTIPLE CHOICE QUESTION

10 mins • 1 pt

Media Image

下列哪種水溶液不會讓電路測試中的發光二極體發亮?(3分)

砂糖水

檸檬酸

小蘇打水

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