________是牙齿最外层,非常坚硬,呈乳白色。
三年级科学:牙齿

Quiz
•
Science
•
3rd Grade
•
Medium
CHEONG LK
Used 200+ times
FREE Resource
20 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
牙龈
神经线
釉质
牙本质
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
________是在牙齿和牙床之间,质地柔软,呈粉红色。
牙本质
釉质
牙龈
血管
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
门齿的形状是_______,能把食物_______。
扁平形 , 切断
棱锥形 , 撕裂
表面宽阔 , 磨碎
扁平形 , 撕裂
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
臼齿的形状是_______,能把食物_______。
扁平形 , 切断
棱锥形 , 撕裂
扁平形 , 撕裂
表面宽阔 , 磨碎
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
犬齿的形状是_______,能把食物_______。
棱锥形 , 磨碎
扁平形 , 切断
棱锥形 , 撕裂
表面宽阔 , 切断
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
我今年9岁,我有一副________;爸爸妈妈有一副__________。
乳牙 , 乳牙
恒牙, 恒牙
乳牙 , 恒牙
恒牙, 乳牙
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
乳牙一共有______颗, 长得较____,适合咬较_____的食物。
20 , 小, 软
32 , 大, 硬
22 , 小, 软
30 , 大, 硬
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