下列各组物质中,因为反应条件或用量不同而发生不同化学反应的是①和HCl ②与③溶液与氨水 ④与稀
—— Do you mind my opening the window? It’s a bit hot in here. —— ______ , as a matter of fact
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 .