在“岁在执徐,月之哉生明者也”中,“哉”之义为()
A.才
B.戴
C.载
D.语气词
参考答案:A
——How much do I owe you for lunch?
——______. It’s nothing.
A.You’re welcome
B.Forget it
C.With pleasure
D.That’s right
改变物体内能有______和______两种方式.将铁丝快速地弯折十余次,铁丝弯折处的温度会升高,这是将______能转化为______能.