干髓剂中不含何种成分
A.丁卡因B.多聚甲醛C.碘甘油D.麝香草酚E.羊毛脂
参考答案:C
They will fly to the Shanghai World Expo, _____ they plan to stay for a week. [ ]
A. where
B. that
C. which
D. when
配合有三种类型,不包括哪种()
A、间隙配合
B、过渡配合
C、超长配合
D、过盈配合