读诗文《枫桥夜泊》，说说诗句“月落乌啼霜满天，江枫渔火对愁眠。”写了几种景象？

在验证淀粉酶的专一性实验中，实验组的试管中加入3ml淀粉溶液和1ml淀粉酶溶液，振荡后置于60℃温水中保温。对照组的正确做法是( )

2元的人民币x张，5元的人民币y张，共120元，这个关系用方程可以表示为____

    Bob and Sue are in the same school，1they are in different classes.After school，Bob and Sue often play games with their friends.Class begins at eight in the morning.Now Bob and Sue are in2own classrooms.They are3to their teachers.Bob is studying English.Sue is having an art lesson.She4to make a birthday card5her mother.

    Her teacher Miss Li is helping her.