关于控制轧制下列说法错误的是（）。
A、可以提高钢材强度
B、可以提高钢材韧性
C、可以细化组织
D、可以提高板形精度
参考答案：D
--- The fog is so thick that the express way ____ have been closed.
--- You are right. I ____ have thought of that. Now we have to take another road.
A．can; should
B．may; can
C．should; must
D．must; should
肿瘤的生长方式有（）、（）和浸润性生长。
