根据句意及首字母提示完成单词
(1)My father usually c____ my homework at home.
(2)____, Tom cleans the classroom and goes home.
(3)You can c____ “save”, and then write a name for it.
(4)Can you see the train t____ on the wall?
(5)I often go to Beijing by t____.
读句子,回答问题。
森林里的野猪啦,小鹿啦,兔子啦,看见狐狸大摇大摆地走过来,跟往常很不一样,都很纳闷。再往狐狸身后一看,呀,一只大老虎!大大小小的野兽吓得撒腿就跑。
思考: “大大小小”指的是什么,表现了什么?
如图所示是赛艇选手进行比赛的场景,当选手用力划艇时,使艇前进的力是( )
已知:4x2-1=Ax-1+Bx+1是一个恒等式,则A=____ ,B=____ .