TCDF型汽轮机（）系统两个转速信号同时丧失时，保护动作跳闸。
参考答案：EHC
根据报盘方式不同，交易席位可以分为（）。
A.有形席位
B.普通席位
C.代理席位
D.无形席位
A company has a cash conversion cycle of 80 days. If the company' s average receivables turn-over increases from 11 to 12, the company' s cash conversion cycle:（）
A. decreases by approximately 3 days.
B. increases by approximately 3 days.
C. decreases by approximately 30 days.
