具有下列电子排布式的原子中,半径最大的是( )A.1s22s22p63s23p2 B.1s22s22p3C.1s22s22p2 D.1s22s22p63s23p4
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 _______ .
My friend showed me round the town, ______ was very kind of him.