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四年级科学单元五 光

Authored by KON KPM-Guru

Science

10th Grade

Used 5+ times

四年级科学单元五 光
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10 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

以下哪项有关“光”的说明是正确的?

光沿着直线传播

光会转弯

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

什么是透明体?

能让电流通过的物体

能让光线透过的物体

能导热的物体

3.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

以下哪个组合是正确的? (答案可超过一个)

不透明体-书本

半透明体- 电视机

透明体- 玻璃杯

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

当光线照射在不透明体时,所形成的影子是。

清晰的

模糊的

非常模糊的

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

图中显示丽丽站在一面毛玻璃前观察外面的景物。根据以上的情况,以下哪项推断是正确的?

毛玻璃是不透明体

毛玻璃是半透明体

毛玻璃是透明体

6.

FILL IN THE BLANKS QUESTION

1 min • 1 pt

Media Image

光离物体越近时,所形成的影子越

(a)  

7.

FILL IN THE BLANKS QUESTION

1 min • 1 pt

Media Image

光线被物体阻挡时,会形成什么?

(a)  

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