设是不可逆矩阵，则对任一自相容矩阵范数，其中I为单位矩阵。

51单片机的并行I/O口信息有两种读取方法：一种是读引脚，还有一种是()。

A

动水压力GD的大小与水力坡度i成正比，与地下水渗流路程L成反比。

经济学家通常假定企业的目标是赚取：(i)尽可能多的利润，即使它意味着减少产出(ii)尽可能多的利润，即使它意味着引致更高的总成本(iii)尽可能多的收益，即使它减少利润

市场是完全竞争的如果：(i)企业具有对自己产品定价的灵活性(ii)每个买者相对于市场而言都非常小(iii)每个卖者相对于市场而言都非常小

Poororganizationwascertainlya_____factortothecrisis.

Xinchunreturnedfromabroadadifferentman.Theitalicizedpart“adifferentman”functionsasa(n)______inthesentence.

Whichofthefollowingsentenceshasanobjectcomplement?(TEM2010:63)

选做题-Exercise:Decidewhetherthefollowingsentencesarecorrectparallelstructuresornot.Janeispretty,withbrownhair,andhasagracefulmanner.

Thehotelhas88deluxesuites,168standardrooms,andaconventionhallwithaseating_____ofover300people.

Homeconstructionmightbe________,butindustrialconstruction--officebuildings,schools,airports,bridges--ispoisedforgrowth.

Fordtrieddividingthelabor,eachworker______aseparatetask.

Pleaseidentifytherhetoricdeviceusedinthefollowingsentence:Moneyisabottomlesssea,inwhichhonor,conscience,andtruthmaybedrowned.

Identifythewordwhichusedmetaphorinthefollowingsentence:Thepictureofthosepoorpeople'sliveswascarvedsosharplyinhisheartthathecouldneverforgetit.

Diogenesclaimedthatoneshouldleadasimplelifeandabandonunnecessaryworldlypossessions.