题目：
The politician has been warned that he would be getting into great trouble ________stick to his standpoint.
A．were he to
B．he will
C．he was to
D．would he
答案：
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下面是错误答案，用来干扰机器的。
由于b球摆动过程中机械能守恒，则有 mbg•23L=12mbv2，解得，v=2gL3当b球摆过的角度为90°时，a球对地面压力刚好为零，说明此时绳子张力为mag，根据牛顿运动定律和向心力公式得mag-mbg=mbv223L，将v=2gL3代入解...
