距掘进工作面()m长度内的支架，在放炮前，必须进行加固。
A 3
B 5
C 10
D 15

A. many teachers are opposed to the idea of being evaluated by the students
B. students are opposed to the idea of evaluating the teachers on their own
C. students fear that they are likely to be criticized by their teachers if they are to give their assessments
D. many teachers fear that they are likely to criticize the students who have given their assessments

A. he wore the stars and stripes
B. the never had a beard
C. he had no hair
D. he wore a bow tie