轴承振动达（）时汽轮机跳闸保护动作。
A.7MILS
B.8MILS
C.9MILS
D.10MILS
参考答案：C
The company has（）over the years into a multi-million dollar organization.
A.involved
B.resolved
C.evolved
D.revolved
粘土成分的影响
