国标GB/T7562—1998((发电煤粉锅炉用煤技术条件》规定的煤质指标有()
A.5个;
B.6个;
C.7个;
D.8个
参考答案:C
She has tried her best, so please don’t be too ____ about her job.
A.practical
B.special
C.responsible
D.particular
室外供热管道一般用水压试验,试验压力应为工作压力的()
A.0.5倍
B.1.5倍
C.2.5倍
D.2倍