A . deflection
B . discrepancy
C . error
D . tolerance
[试题]B.eforeyoumailthisletter,youshouldcheckagainwhetheryouhave_______itornot.A.sunkB.sighedC.soughtD.sealed
[问答题]You should look around before you cross the street.
[单选题]You should [convert]RMB into foreign currency before you go abroad.A.alterB
[单选题]You should have [blended]the butter with the sugar thoroughly before you he
[单选题]You should have [blended]the butter with the sugar thoroughly before you he
[单选题]What should be prepared before disassembly of cylinder for main engine or auxiliary engine?
[单选题]You should work for __________ if you become an editor of the magazine.A. just nine hours a dayB. no less than nine hours a day C. about ten hours a dayD. less than 25 hours a week
[单选题]_____you may have, you should gather your courage to face the challenge.A. However a serious problemB. What a serious problemC. However serious a problemD. What serious a problem
[单选题]H.ow many tablets should one take before he goes to sleep?A.oneB.twoC.one and halfD.three
[单选题]---What should I do first before boarding? ----().A.You may ask the policeman there to help.B.Please go to the airline counter to check-in for your flight.C.You should wait and see.D.You have to go there to check in for your flight.