汽轮机甩负荷后转速飞升过高的原因有()。
A、调节汽门不能正常关闭;
B、调节系统动态特性不良;
C、调节系统整定不当;
D、调节系统速度变动率过小。
参考答案:A, B, C
Now that he ________ that he had stolen the money, you should have forgiven him. [ ]
A. excused
B. suffered
C. admitted
D. offered
柴油机拉缸时会有哪些征兆?