依據(jù)《建設(shè)工程安全生產(chǎn)管理?xiàng)l例》，施工單位應(yīng)當(dāng)設(shè)立安全生產(chǎn)（）機(jī)構(gòu)，配備專職安全生產(chǎn)管理人員。
A、檢查D
暫無解析
JackisateacherofEnglish.Heisnotyoung，butheisnotold.Hehasaroundfaceandblackhair.Heistall.Therearefiftystudentsinhisclass.Theyalllikehim.Nowit'sintheafternoon.Look，somestudentsareworkingintheclassroom.Jackisthere，too.HeishelpingthemtostudyEnglish.Heisagoodteacher，andheisagoodfriendofthemall.
()1.WhatdoesJackdo?
A.Heisaworker.
B.Heisateacher.
C.Heisadoctor.
D.He'sanurse.
()2.Whatcolourishishair?
A.It'sblack.
B.Hisheiriswhite.
C.Itisbrown.
D.Hehasyellowhair.
()3.Howmanystudentsarethereinhisclass?
A.Therearefifteenstudentsinhisclass.
B.There'sfifty.
C.Hehasfifty.
D.There'refiftyinit.
()4.Jackisagoodteacher，isn'the?
A.Yes，heisn't.
B.No，heis.
C.Yes，he's.
D.Yes，heis.
()5.Whatarethestudentsdoingintheclassroom?
A.Theyarewalkingthere.
B.Theyaredoingtheirlessons.
C.Theyarehelpingtheirteacher.
暖流經(jīng)過的海區(qū)，海洋表面等溫線()
—Haveyougotadictionary?
—_______________
世界上城鎮(zhèn)人口最多的國家是()
某種鐵線蓮的根莖可作中藥，有重要經(jīng)濟(jì)價值。下表為不同遮光處理對其光合作用影響的結(jié)果，相關(guān)敘述正確的是
