三年级科学（单元3练习2：牙齿）
Quiz
•
Science
•
1st - 8th Grade
•
Medium
CELIA HO Y W
Used 350+ times
FREE Resource
12 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
P，Q和R代表牙齿的哪个部分？
P 血管
Q 釉质
R 神经线
P 牙龈
Q 牙本质
R 血管
P 牙本质
Q 血管
R 神经线
P 釉质
Q 牙本质
R 神经线
2.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
图中显示牙齿的构造。
Z的名称是________。
釉质
神经
牙本质
臼齿
3.
MULTIPLE SELECT QUESTION
20 sec • 1 pt
哪项是乳牙的特点? 【多选】
釉质和牙本质较厚
只能维持到大约12岁
釉质和牙本质较薄
小和弱
4.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
以下哪项有关恒牙的说明是不正确的？
一共有32颗
坚硬度较坚固
能够维持一辈子
被拔掉后还会长出新牙
5.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
乳牙脱落后，__________ 将会替代乳牙。
假牙
乳牙
恒牙
金牙
6.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
乳牙共有______颗，而恒牙共有________颗。
18、20
20、32
32、36
16、30
7.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
以下哪项有关恒牙的说明是不正确的？
一共有32颗
坚硬度较坚固
能够维持一辈子
被拔掉后还会长出新牙
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