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【判断题】
( )齿按形态位置和机能可分为切齿、犬齿和颊齿三种。A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】What is the function of the rods?
A.
To fix the cylinder covers and the liners together.
B.
To support the cylinder.
C.
To secure the bedplate, frames and cylinder blocks together,
D.
To stiffen the foundation of the engine.
【多选题】影响对称键槽宽度尺寸的因素有( )。
A.
未经试铣
B.
铣刀的宽度或直径尺寸不合格
C.
铣刀有摆差、圆跳动太大
D.
盘铣刀端面圆跳动太大
E.
吃刀深度、进给量过大，产生“让刀”
【简答题】What is the function of the crankshaft?
【单选题】What is the function of the cecum ?
A.
promote peristalsis（蠕动） of the bowel
B.
prevent the backflow of food
C.
breath
D.
digest the food
【简答题】What is the function of the governor?
【单选题】What is the function of the epididymis?
A.
Produces sperm
B.
Stores sperm and facilitates their maturation
C.
Stores sperm and produces seminal fluid
D.
Carries semen out through the penis
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