实验室需要200 mL 1 mol·L-1的CuSO4溶液,下列有关配制该溶液的叙述,正确的是()
It’s high time you had your hair cut ; it’s getting _______ .
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.