下列哪项不是Begg细丝弓矫治器的组成部分 ()
A.栓钉
B.方弓丝
C.正轴簧
D.托槽
E.带环及颊面管
参考答案:B
Having much to do,________.
A.so let’s finish at it at home
B.the tour should be put off
C.but we should still take the tour
D.we have to stay at home
属于对因治疗的是()
A.青霉素治疗G+菌感染
B.肾上腺素治疗支气管哮喘
C.哌替啶治疗各种疼痛
D.青蒿素治疗疟疾
E.硫酸钡胃肠造影