常停机观察磨内情况时，一仓钢球全部露在外面，说明一仓破碎能力正常。
参考答案：错
When _______ about their opinion of the effect of modern equipment on their performance of tasks, many young people gave a positive response.
A．asked
B．asking
C．being asked
D．to ask
施工总平面图设计的优化方法有哪些
