商品报损须尽快明确责任归属，避免处理过程中的（）。
A、二次损失
B、丢失
C、临期
D、销售
参考答案：A
The workers are so _____ to the noise of the machine that they don't even notice it during their work. [ ]
A. accustomed
B. subjective
C. familiar
D. associated
过点P(1，0)作抛物线[*]的切线，该切线与上述抛物线及x轴围成一平面图形．求此平面图形绕x轴旋转一周所成旋转体的体积．
