高精度磨削时，砂轮的修整位置与磨削位置应尽量接近。
参考答案：对
下列各项中，不属于虚喘危候的是（）
A.汗出如油如珠
B.足冷头汗
C.面赤躁扰
D.脉浮大无根
E.呼吸窘迫
The representative of the committee was asked to verify his earlier statement.
A．confirm
B．withdraw
C．repeat
D．modify
