（）是按照编织要求发出指令并协调各机构工作的机构。
参考答案：控制机构
To our great surprise, the painting _______ should have won the prize.
A．considered being copied
B．considering to be copied
C．considering having been copied
D．considered to have been copied
因式分
（1）x2y-2xy2+y3；
（2）（x+2y）2-y2．
