金属材料对于压痕、抓痕、磨蚀或切削的抗力或阻力叫硬度。
参考答案：对
具有双重权威矛盾人格的人会臣服于强有力的父亲偶像，又发展出无限制地控制他人的欲望。
——You don’t go to that cinema quite often, do you?
—— No, I only go there ______ because it’s too far away from my house.
A．eventually
B．constantly
C．occasionally
D．frequently
