下列四幅实验装置图所反映的原理,对电动机的发明有直接影响的是:[ ]
A.
B.
C.
D.
答案:D
小题1:There’re 24 h_________ in a day .
小题2:What’s his j________ ? He’s a teacher .
小题3:Don’t l_________ to music in class .
小题4:Jackie Chan is a very s__________ actor . He’s in many movies .
小题5:S__________ is the first day of a week .
小题6:My mother has lots of work to do every day . She’s very b_________ .
小题7:Beijing is the capital (首都)of C__________ .
小题8:I can’t a________ that question. It’s too difficult
小题9:Best w__________ to you , Miss Jin .
小题10:Kate , please w_________ your name on the card .
土压平衡式盾构机在()土质应用前,不需要进行辅助工法,辅助设备等等充分验证
A.泥岩
B.卵岩
C.松散沙砾