【简答题】下列广义积分中( )是收敛的. A. B. C. D.
【简答题】下列广义积分中( )是收敛的. A. B. C. D.
【单选题】I ______ you that these goods will be delivered to you tomorrow morning.
【简答题】Will you please contact your manufactures, and ask them to ______ the goods in time?
【单选题】If you buy our goods, our company will ________ the goods to your door. [ ]