自动扶梯的安全保护装置主要有以下（）。
A、电磁制动器ABCD
暂无解析
Well-arrangedsentencesareconsideredgrammaticalsentencesthatareformedfollowingasetofsyntacticrules.
In1920,()publishedhisfirstnovelThisSideofParadisewhichwas,tosomeextent,hisownstory.
Egypt’sverysoilwasbornintheNile’sannualflood;withthefloodcamethelife-givingmudthatmadeEgyptthegranaryoftheancientworld.（）
Attheageofeighty-seven,()readhispoetryattheinaugurationofPresidentJohnin1961.
Thesetwoalarmclocksarenormallysettogether,butnowtheyhavebeenresetafewhours_________.
