如下图所示，一个定滑轮和一个动滑轮组成滑轮组，站在左侧的人要拉起重物G，应如何绕线
参考答案：
— I’ve never found a better job.
— ______.
A．Congratulations
B．You have really bad luck
C．I am sorry to hear that
D．Don’t be worried
结核
