劳动力参与率是衡量、测度（）程度的指标。
A.人口密度
B.社会劳动强度
C.人口参与社会劳动
D.参加工作人口比例
参考答案：C
Although it is _____ to watch programs on TV sometimes, I think people shouldn’t spend all the time watching it.
A．worthwhile
B．worthy
C．worth
D．worthy of
染色的其他混纺棉布
