孔子曾说“中上(智力中上等)之人,可以语上(深奥的学问)也,中下之人,不可以语上也。”这表明他提倡[ ]
A.启发诱导
B.因材施教
C.温故而知新
D.有教无类
答案:B
-- What _____ exciting experience to jump down from _____ bridge of 50 meters high!
-- Oh, I can never imagine that. Bungee jumping is too dangerous, I think.
A./ ; a
B.an ; the
C./ ; the
D.an ; a
在海水中100万个氢原子总约含有多少个氘原子()
A、140.0
B、150.0
C、160.0
D、170.0