体积相同、pH值相同的HCl溶液和CH3COOH溶液,与NaOH溶液完全反应时两者消耗NaOH的物质的量
Charles was alone at home, with_______ looking after him.
It is often ______ that human beings are naturally equipped to speak.
I can’t leave. She told me that I ______ stay here until she comes back.
—— 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 _______ .