点P位于x轴下方,y轴左侧,距离x轴4个单位长度,距离y轴2个单位长度,那么点P的坐标是
[ ]
A.(4,2)
B.(﹣2,﹣4)
C.(﹣4,﹣2)
D.(2,4)
答案:B
Competitors are allowed to take a five-minute break every hour to eat,drink or do ________ is necessary
A.which
B.that
C.where
D.what
绝热压缩