碱性石料与沥青黏附性好,通常是用石料的水溶液的pH值来判断石料的酸碱性。( )
参考答案:错
解析: 通过石料与沥青黏附性试验来检测石料与沥青黏附性的好坏,包括水煮法和水浸法。
— He ought to have been warned of the danger.
— ______, but he just wouldn’t listen to me.
A.So ought he
B.So he was
C.So was he
D.So he had
发电设施的保护范围()
A、发电厂内的设施。
B、发电厂外专用的水井、铁路。
C、水力发电厂使用的水库。
D、发电厂外专用的码头。