胶带运输机主要适用于竖井开拓矿山。其优点是运输能力大，缺点是受矿石硬度和比重的影响，多应用于破碎硐室与计量硐室的短距离运输。
参考答案：错
I could have helped him out, to tell the truth, I _____ too busy.
A．am
B．was
C．have been
D．had been
惠州社保卡金融帐户如何激活？
