安全帽的主要作用是防止物料下落击中头部及行进中碰撞突出物而受伤。
更新时间:2024-11-24 05:41:20 1、正确正确
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is,are,was,were,itself,himself,themselvesThetradeunion________believedtoregard________asanorganizationwherethemolestedcouldseekadviceandhelp.
EugeneO’Neill’sfirstfull—lengthplay,(),wonhimthefirstPulitzerthemeisthechoicebetweenlifeanddeath,theinteractionofsubjectiveandobjectivefactors.
中国自20世纪60年代开始进行海洋油气资源的自营勘探和开发。（）
is,are,has,have,havingTheaverageBritishfamily,which________smallerandricherthan50yearsago,________3.6members.
Weather_______,we’llgooutforawalk.
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