认为封建君主是“天下之大害”的思想家是()

什么是“休养生息”政策?西汉初年为什么实行这个政策?有何效果?

已知点A(4,1),B(2,3)，则线段AB的垂直平分线方程为()

一首纪念某重大历史事件的诗歌写道：“神舟昏暗虎狼凶，捍卫国家意志雄。学子斗争惊列寇，豪杰攻打震华庭。反封反帝风云涌，休课休劳波浪凶。□□□□值赞颂，优良传统要扬承。”下列选项适合填在空格处的是

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.