在标准状况下,将1.40g氮气、1.60g氧气和4.00g氩气充分混合,则该混合气体的体积为( )
My friend showed me round the town, ______ was very kind of him.
They use computers to keep the traffic _______ smoothly.
If you leave the club, you will not be_____back in .
What I need is_____ book that contains ______ABC of oil painting.
Jenny nearly missed the flight______ doing too much shopping.