在路基爆破施工中，可以对开挖限界以外山体起保护作用的爆破技术是()。
A．光面爆破
B．预裂爆破
C．微差爆破
D．定向爆破
参考答案：B
Cindy is ______six-year-old girl and she has become famous since her _______first appearance in the show Where Are We Going, Dad?
A．a, the
B．a, /
C．the, the
D．the, /
