物质的下列性质属于物理性质的是 A.氧气能转化成臭氧 B.食盐水能导电B.钠能浮在水面上 D.钾能溶于酒精
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.
The CDs are on sale! Buy one and you get ______ completely free.