建筑高度不大于()m的建筑，连续布置消防车登高操作场地确有困难时，可间隔布置，但间隔距离不宜大于30m，且消防车登高操作场地的总长度应符合规定。
A. 24
B. 32
C. 50
D. 100
单班单司机值乘的货物列车，车站值班员接到值乘司机突发疾病无法操纵列车，已就地停车的报告时，须立即报告（），组织救援。
A. 调度指挥中心
B. 临线司机
C. 医院
D. 列车调度员
为了验证可运行性所要求的试验，系统在行政管理下恢复服役，归为正常运行限制条件()的一种例外情况。
A. I
B. II
C. III
D. IV
In terms of pressure and temperature in the refrigerant in the compressor, what happens to
A. its pressure and temperature are both lowered
B. its pressure and temperature are both raised
C. its pressure is lowered and its temperature is raised
D. its pressure is raised and its temperature is lowered
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