掘进工作面的净化水幕距工作面应在50m范围内。
参考答案:错
在SAR指标的应用时,当价格处于红色圈状线上方运行时,若产生回调,一般会在圈状线附近展开重新上涨;当价格处于绿色圈状线下方运行时,常会产生反弹,但会在圈状线附近重新下跌()
Mary is the best student in our class. I wonder whether anyone has got _______ mark in this examination.
A.a high
B.a higher
C.the higher
D.the highest