在锅炉运行时,应经常注意观察排烟温度的变化,当排烟温度突变为正常温度的()时,应采取措施。
A、20%
B、15%
C、10%
D、5%
参考答案:C
发包就是通过从项目执行组织外部获得( )而把风险转移出去。
A.货物
B.工程
C.服务
D.投资
E.技术
The seals were stranded(搁浅)on the Rhode Island beaches,_____ they were rescued last year.
A.in which
B.from which
C.from where
D.from there