小蓟的功能是
A.化瘀止血,活血定痛B.化瘀止血,理气止痛C.凉血止血,清热利尿D.温经止血,安胎
参考答案:C
在制作烤瓷桥时,减轻固定义齿桥体的受力措施错误的是 ()
A.减少桥体牙合面的颊舌径宽度
B.加大桥体与固位体之间的舌侧外展隙
C.减少牙合面的溢出道
D.减少早接触
E.降低非功能尖斜度
John Lennon and Paul _______ the main songwriters of the Beatles in 1960s. [ ]
A. are
B. is
C. was
D. were