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三年级科学- 人类

Authored by Wansi Lee

Science

9th - 10th Grade

Used 103+ times

三年级科学- 人类
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15 questions

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1.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

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M牙齿有什么功能?

切断牙齿

消化食物

磨碎食物

把食物撕裂

2.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

以下哪项不是恒牙的特征?

大约在6个月时长出

能维持一辈子

釉质和牙本质较厚

总数有32颗牙齿

3.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

蛀牙是由什么生物造成的?

细菌

蠹(dù)虫

螨 (mǎn)虫

蛔 (huí)虫

4.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

吃完午饭后,秀芳发现牙缝中有食物残渣。她可以用什么来进行清理?

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Media Image
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Media Image

5.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

哪项有关恒牙的说明是正确的?

有32颗牙

能维持一辈子

在六岁后开始长出

与恒牙相比,较不坚固

6.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

以下哪个行为会破坏牙齿?

补牙

装置假牙

经常吃甜食

进行牙根治疗

7.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Media Image

门齿的功能是什么?

切断食物

消化食物

磨碎食物

撕裂食物

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