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【单选题】
磨削加工中,大部分磨削热A.
被磨屑所带走
B.
传给工件
C.
传给刀具
D.
传给机床
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【判断题】We are glad that in the past few years,by joint efforts,have been greatly promoted both business and friendship.()
A.
正确
B.
错误
【单选题】In the course of preparing a company's statement of cash flows, the following figures are to be included in the calculation of net cash from operating activities. $Deprecia...
A.
Addition to operating profit $890,000
B.
Subtraction from operating profit $890,000
C.
Addition to operating profit $1,070,000
D.
Addition to operating profit $990,000
【单选题】假如已经定义了一个类Circle,请写出调用它的area方法计算边长为r的正方形面积的语句:( ) class Circle{ public function area($r){ return $r*$r; } } $r=10; $circle=new Circle(); $area=_____________;//调用area方法 echo "正方形面积为:".$area;
A.
this->area()
B.
this->area($r)
C.
$circle->area($r)
D.
$this->area($r)
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