![](https://lstatic.shangxueba.com/jiandati/pc/images/pc_jdt_tittleico.png)
In screw joint, the end line should be drawn at the position of
A、same level with contacting surface
B、above the contacting surface
C、under contacting surface
D、any position
![](https://lstatic.shangxueba.com/jiandati/pc/images/jdt_panel_vip.png)
A、same level with contacting surface
B、above the contacting surface
C、under contacting surface
D、any position
A、adhere
B、conductive
C、addicted
D、conducive
A、Being able to do something others cannot do gives one face
B、Being praised in public gives one face
C、Manual laborers pay more attention to “face” than white collars
D、More people place much more value on their mianzi than lian.
A、Cefaclor
B、Cephalothin
C、Cephalexin
D、Cefuroxime
E、Cefoxitin
A、Bm=d, for steel
B、Bm=1.25d or 1.5d for cast iron
C、Bm=2d for aluminum
D、Bm=0.5d for steel
A、length of the key
B、width of the key
C、height of the key
D、number of the key
A、45°
B、60°
C、90°
D、120°
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