轧辊硬度通常是指轧辊表面的工作硬度，它决定轧辊的（）。
A、耐热性
B、耐磨性
C、耐冲击性
D、耐腐蚀性
参考答案：B
China ______ excellent service (服务) during the 29th Beijing Olympic Games. [ ]
A. supported
B. afforded
C. provided
D. suggested
Cynics believe that people who （） compliments do so in order to be praised twice.
A．bask in
B．give out
C．gloat over
D．shrug off
