输卵管结扎术，提取输卵管的方法有（）
A.卵圆钳夹法
B.指板法
C.钩取法
D.手取法
E.以上均可
参考答案：A, B, C, D
One third of the students______ Young Pioneers, and the number of this_____ not change much in our class this term. [ ]
A. is, do
B. are, does
C. was, are
D. were, were
以下哪些违章使用液化石油气钢瓶（）？
A.火烤
B.开水烫
C.倒立放置
D.放置干燥地方
E.倒残液
