默写《泊船瓜洲》这首古诗
《泊船瓜洲》
____ ,____ 。____ ,____ 。
如果单项式−12xay2与 13x3yb是同类项,那么a,b分别为( )
探究电磁感应现象应选用如图____(选填“甲”或“乙”)所示的装置进行实验.在这个现象中感应电流的方向与____的方向和磁感应线方向有关.
A:____
B:Good morning.
B:My name is Jack.
B:I'm twelve.
B:Table tennis.
B:OK.
A.How old are you?
B.Good morning.
C.Let's play it in the afternoon.
D.What's your name?
E.What's your favourite sport?