患者，男，46岁，出现血尿，首先应考虑为
A．泌尿系结石
B．败血症
C．流行性出血热
D．前列腺炎
E．白血病
参考答案：A
After a knock at the door, the child heard his mother’s voice ____ him. [ ]
A. calling
B. called
C. being called
D. to call
局部地段轨枕埋深不足其厚度的（）时，应重新埋设。
A、1/3
B、2/3
C、3/4
D、3/5
