石料的抗压强度试验可根据需要选择不同含水状态进行。( )
参考答案:对
The most common symptom associated with bladder cancer is
A. burning on urination.B. frequent infections.C. painless hematuria.D. decreasing urine output.
配合煤的细度过低,会造成焦炭强度M40()。