锅炉有哪些停炉保护?
参考答案:
(1)K01单元机组全停;
(2)K02主燃料系统掉闸;
(3)K03锅炉空载运行(接收汽轮机、发电机动作信号);
(4)K04灭火保护。
A survey was carried out on the death rate of those who were infected by SARS, ________were surprising.
A.as results
B.which results
C.the results of it
D.the results of which
第三方支付面临的问题包括()。
A.交易欺诈问题
B.运行风险问题
C.市场竞争问题
D.服务范围窄的问题