题目内容
（请给出正确答案）
A、Do you have a reservation, please？
B、Could you tell me your name, please？
C、Could you spell your name, please？
D、All of the above
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A、luxurious wine
B、personal note
C、expensive tea
D、money
For a standard external involute spur gear,
,
(1) find standard center distance
, base circle
addemdum circle
pitch of base circle . (2) use scale of
to draw therectical meshing line
, actual meshing line
, pitch circles of gear 1 and gear 2 , and meshing angle. ( driving gear 1 rotates clockwise) (3) calculate contact ratio
by measuring the length in above figure and label double teeth meshing zone and single tooth meshing zone. (4) determine whether this gear pair can transmit motion continuously? why?
A、Right away, sir.
B、I’ll send it to your room at once.
C、I’m afraid another guest is using it. I’ll bring it to you as soon as it’s available.
D、Could you spell your name, please?
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