如果在载玻片上写“→”那么在显微镜下可看到[ ]
A.→
B.↑
C.←
D.↓
答案:C
You don't like popular music.Just keep on ___ it for a week and you will enjoy ___ it surely.
A.hearing… listening
B.to listen… to hear
C.hear..listen
D.listening to..hearing
病人10岁,替牙,磨牙Ⅲ类关系,下颌轻度前突,需要采用颏兜限制下颌发育,矫治力大小最好为()
A.50~100克
B.100~200克
C.200~300克
D.500~1000克
E.1000~2000克