AB杆质量为m，长为 L，曲柄 O1A、O2B 质量不计，且 O1A=O 2B=R ，O1O2=L，当φ =60°时，O1A 杆绕 O1轴转 动，角速度ω为常量，则该瞬时AB 杆应加的惯性力大小为 __________，方向为 __________
Fgh=mRω2、过质心C平行O1A指向向下
暂无解析
Gene:ShallIopenthiswindow?
Jodie:______
Thestoreisinanideal( )todrawtourists.
We will do our best to _____ shipment to meet your requirements in time.
Mysisterwasn'tinParislastmonth,soyou_____herthere.
SectionB
Directions:Therearetenblanksinthefollowingletter.YouarerequiredtochoosethebestonefromthegivenfourchoicesmarkedA,B,C,andD.Thenwritedownthecorrectanswerinthebrackets.Thissectiontotals10points,onepointforeachblank.
DearMr.Bush
Thankyouforyour1ofJanuary5forourBeautyBrandBlouses.
Wearenowexporting2ofvariousbrands,amongwhichBeautyBrandisthemostfamous.Theyareingreat3abroadandourstocksarerunning4quickly.Theyarepopularnotonlyfortheirnoveldesign,butalsoforthereasonableprices.Weareconfidentthatonceyouhavetriedourblouses,youwillplacerepeatorderswithus5largequantities.
Asyourequested,wearenow6asfollows:
Price:US$600perdozenCIFNewYork
TermsofPayment:BysightL/Ctobeopenedthroughabanktobe7bytheSellers.
Shipment:InMarch2007.
Pleasenotethatwedonotallowanycommission8ourblouses,butadiscountof5%maybe9ifthequantityismorethan1,000dozen.
Theaboveofferismadewithout10andissubjecttoourfinalconfirmation.
Wehopethatyouwillplaceanorderwithusatanearlydate.
Sincerelyyours
()1.A.requestB.enquiryC.acquisitionD.requirement
()2.A.blousesB.womanblousesC.womanshirtsD.ladyshirts
()3.A.needB.wantC.requireD.demand
()4.A.upB.offC.downD.away
()5.A.atB.forC.inD.with
()6.A.orderingB.offeringC.placingD.advising
()7.A.agreedB.approvedC.acceptableD.covered
()8.A.onB.inC.ofD.at
()9.A.providedB.suppliedC.furnishedD.granted
()10.A.promiseB.dutyC.engagementD.onus
