【单选题】标准直齿圆柱齿轮分度圆直径d、基圆直径 d b 与压力角α三者的关系为( )。
【判断题】( )单锉纹锉刀用以锉削软材料为宜。A. 对 B. 错
【单选题】By saying 'Stevie soon graduated from toy instruments to real instruments', the author means that______.
A.
Stevie finished his study at a toy instruments school
B.
Stevie began to study in a real instruments school
C.
Stevie gave up all his toy instruments and began to buy many real instruments
D.
Stevie started to play real instruments
【单选题】By saying 'Stevie soon graduated from toy instruments to real instruments', the author means that________
A.
Stevie finished tiis study at a toy instruments school
B.
Stevie began to study in a real instruments school
C.
Stevie gave up all his toy instruments and began to buy many real instruments
D.
Stevie started to play real instruments
【简答题】By saying 'Stevie soon graduated from toy instruments to real instruments', the author means that______. [A] Stevie finished his study at a toy instruments school [B] Stevie began to study in a real i...
【单选题】By saying 'Stevie soon graduated from toy instruments to real instruments', the author means that ______.
A.
Stevie finished his study at a toy instruments school
B.
Stevie began to study in a real instruments school
C.
Stevie gave up ail his toy instruments and began to buy many real instruments
D.
Stevie started to play real instruments