发动机汽缸体纵向变形的规律是呈两端低、中间高的弧形。
1、正确错误
暂无解析
()What'sthisinEnglish?_____ajeep.
2013年12月19日,习近平总书记在中央政治局常委会上指出,新疆的问题,最难最长远的还是民族团结问题。在新形势下加强民族团结,我们必须
①坚持民族区域自治制度②坚持民族平等、团结和共同繁荣的原则
③自觉履行促进民族团结进步的义务④同分裂祖国、破坏民族团结的行为作坚决的斗争
有①氨水②NH4Cl溶液③Na2CO3溶液④NaHCO3溶液各25mL,物质的量浓度均为0.1mo1/L,下列说正确的是
能同时被2、3、5整除的最小两位数是________,最大两位数是________.
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.