卷扬机一般都采用电磁铁闸制动器，影响制动效果的因素主要是主弹簧的（）及制动块与制动轮的间隙。
更新时间:2024-11-20 02:32:04张力
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我感谢陆登庭校长的邀请，使我有机会在这美好的金秋时节来到你们这座美国古老而又现代化的学府。（）
InCanadathefederalgovernmentshavealwaysbeenformedby________.
ForelectoralpurposesBritainisdividedinto659constituencies,eachofwhichreturns________totheHouseofCommons.
Duringthe1990smanyAustralianscalledfortheirnationtobecomearepublicwith________.
Ittookafewsecondsforhereyesto________tothedarkness.
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