上颌第二前磨牙近中面邻接处位于
A.舌1/3与中1/3交界处B.在舌1/3近牙合缘处C.中1/3近牙合缘处D.颊1/3与中1/3交界处E.颊1/3近牙合缘处
参考答案:C
When she woke up, she realized that the things she had dreamt about could not have happened.
A.possibly
B.likely
C.certainly
D.usually
关于吸烟的危害不正确的是( )
A.烟雾会抑制气管和支气管内表面的黏膜上纤毛运动,使痰液不能及时排出,降低了呼吸道的净化作用
B.吸烟者易患慢性支气管炎、肺癌等疾病
C.青少年吸烟,呼吸道黏膜易受损伤
D.烟雾有利于肺活量的增加