缓冲区和伸缩区的设置有何规定?
参考答案:
缓冲区和伸缩区不应设置在道口或不作单独设计的桥上。有碴桥跨度不大于16m时,伸缩区可设置在桥上,但轨条接头必须在护轨范围以外。
Jone has put on so much weight recently that his mother has to ____all his trousers to his measure
A.let out
B.give away.
C.bring in
D.make up
流行性出血热常规检查,下列最具有诊断意义的是()
A.白细胞计数增加
B.中性粒细胞增加
C.病程的第4~5天后淋巴细胞增多
D.血小板减少
E.幼稚细胞