拉式膜片弹簧离合器分离指在分离轴承（）的作用下离合器分离。
A.向前推力
B.向后拉力
C.向左拉力
D.向右拉力
参考答案：B
When Zhao Benshan appeared on the stage, people______laughter. [ ]
A. broke up
B. broke into
C. broke in
D. broke off
