某高分子化合物干馏后分解为A,A能使溴水褪色,1 mol A和4 mol H2加成后生成化学式为C8H16的烃,则该高分子化合物是:
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.