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刀开关如何安装？

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当发生短路故障时，空气开关内部如何动作？

Completethefollowingsentenceswiththewordsgivenbelow.Changetheformifnecessary.Capacityaffectionatehuddlebundledemonstratewisekingborestar1.Wecollecteda(n)_____ofoldclothestogivetopoorpeople.2.Astyleconsultantwillhowtodresstoimpress.3.Somepeoplehaveagreater_forlearningthanothers.4.Thecoldwindmadetheboy_insidehiscoat.5.Hepattedher_onthehead.6.Therecordstartedtheyoungsingerontheroadto_.7.Localpeoplearequestioningthe_ofspendingsomuchmoneyonthenewroad.8.Aftertheoldkingdied,hissonruledoverthe_.9.Listeningtomusiccanrelievethe_______ofrunning.

圆锥齿轮的轴向力方向（）

A. 大端指向小端
B. 小端指向大端
C. 向上
D. 向下

对于直径很小的钢制圆柱齿轮，若齿根圆到键槽底部的距离为（），做成齿轮轴。

A. <2mt
B. <2ma
C. <3mt
D. <3ma