当发现线路轨向不良,其平均值达到()时,必须设置慢行信号,并采取夯拍道床,填满枕盒道砟和堆高砟肩等措施。
A、6mm
B、8mm
C、10mm
D、12mm
参考答案:C
— What a fine day! Shall we go picnicking?
— ____. But we need to be home before six o'clock for the football match. [ ]
A. Have a nice time
B. Pardon me
C. That's great
D. You are right
试述医院文化在现代医院管理中的作用。