由于大部分多环芳烃具有强烈的致癌性和致畸性，操作时必须极其小心。
参考答案：对
______ takes me ten minutes ______ the picture.
A．It, to draw
B．It’s, to draw
C．That, drawing
D．It, draws
The man with _____ shoulder stared at the boy with _____ eyes. [ ]
A. wide; broad
B. broad; wide
C. wide; wide
D. broad; broad
