标准的PCR过程一般分为变性、复性、延伸三大步,这三大步需要的温度依次是()
__youacceptouroffer,pleasecableusorourconfirmation.
InfacttheSwedendidnotunderstandthethreequestions____wereaskedinFrench.
I____comeyesterday,butIcouldnot.
WhichgateisflightBA472toMadridleavingfrom?
FOBST由( )支付装船费。
WhichjobatHudsonswillPamapplyfor?
This price is ____ of your 5% commission.
Talkingtoforeignersisfunifyou____therighttimeandplace.
Nancy:MayIseeyourdrivinglicenseandvehicleregistrationcard,please?
Dick:______.
Howmanytypesofbusinessmeetings?