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四年级科学 第二单元 5-8

Authored by 7xg4kyxzk6 apple_user

Science

4th Grade

Used 1+ times

四年级科学 第二单元 5-8
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34 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

接线盒中两个接线柱之间要实现通路必须要有导线连接。

正确

错误

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

检测接线盒内部的连接方式实验中,根据实验现象只能对应一种电路连接方法。

正确

错误

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

用电路检测器检测两个接线柱之间是通路,则这两个接线柱之间一定有导线直接连接。

正确

错误

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

用电路检测器检测两个接线柱之间是断路,则这两个接线柱之间一定没有导线直接连接。

正确

错误

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

用电路检测器检测接线盒内电路的连接情况(如右图),以下三种检测顺序更为合理的是。

1-22-3 1-41-3 2-43-4

3-42-3 1-41-2 2-41-3

1-21-3 1-42-3 2-43-4

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

电路中有一个接线盒,有四个接线柱。已知电路通断情况如右图所示,则接线盒内部的连接方式不可能是。

Media Image
Media Image
Media Image

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

金属都是导体。

正确

错误

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