PassageFourQuestions17to21arebasedonthefollowingpassage.DialogueisparticularlyeffectiveinteachingidiomaticEnglish.Weusethefollowingexercisewithstudentsatalllevels.Wepairupstudentsforthefirststageofwritingdialoguesandaskthemto"createascene."Theyhaveafewdaystothinkabouttheirsceneandtomeetwiththeirpartneroutofclass.Aftertheperiodofpreparation,thepairssitdownandworkouttheirdialoguealongwithitsscene.Theyusuallyprepareseveraldialogueswithsimilarcontentandthenhandinthebestonetotheteacher.Theteacherthenmeetsthepairstoexchangeideas,focusingonidiomaticlanguageuse.Thestudentsrevise(修改)untiltheirdialogueshaveanAmericanring.Asecondexerciseasksthestudentpairsto"produce"theirscenes,assigningtheirclassmembersascharactersandperhapsputtingtogethersomesimpleprops(道具).Sometimesoneclasswillpresentitsscenestoanotherclass.Weliketovideotapetheseproductionsforuseasteachingtools.Ingeneral,wehavefoundthatwritingdialoguebeforemovingintothespeakingstagehasmanyadvantagesandprovidesfeedback(反馈)fromtheteacherduringtheprocessofcreatingthescene.17.Theauthor,anEnglishteacher,askshisstudentstowritedialoguessothathisstudentscanbebetter__________.

17.Ididn'tknowthatthispicturewasdrawn_________achild.

17、淬火钢7级精度外圆表面常采用的加工路线是（ ）。

17、当工艺基准与设计基准不重合时，需对工艺尺寸链进行工序尺寸和公差的换算。

17.Atthanksgivingday,Isent()manyThanksgivingcardstomyfriends.

17、（）菜具有清鲜、爽脆、清雅精致的特点。

17、在组织流水施工时，用来表达流水施工在施工工艺方面进展状态的参数通常包括（）。

17.Où__________ ?

计算机辅助制造进行的内容有()

下列构件中，()不是结构的承重构件

三个面变形程度一致的是()

国家标准的幅面尺寸中，A一的尺寸为()

某框架柱的配筋为φ八@一百/两百，其含义为()

下列不属于构件详图的是()

17、企业保证会计信息真实可靠、内容完整符合可靠性要求。（　）