【判断题】CTCS-4级列控系统是完全基于无线传输信息的列车运行控制系统。
【单选题】用基准物质K2Cr2O7标定Na2S2O3溶液浓度时,采用的滴定方式是:
【单选题】听力原文:M: Rebecca, did you hear Radio broadcasting that temperatures have today reached a record 102 degrees and may well hit 110 tomorrow? W: I heard that, Aaron, but it's not surprising actually, beca...
A.
It is the worst drought they have ever had.
B.
It is the second worst drought for many years.
C.
It is the second year they suffer from drought.
D.
It is the worst season for them to have drought.
【判断题】CTCS-4 级:是完全基于无线信道传输信息的列车运行控制系统。地面可取消轨道电路,由 RBC 和车载验证系统共同完成列车定位和完整性检查,实现虚拟闭塞或移动闭塞。国内目前尚未应用,是列控系统未来发展的方向。
【判断题】CTCS-4级列控系统是完全基于无线传输信息的列车运行控制系统。
【单选题】标定Na 2 S 2 O 3 采用的基准物质是( )
【单选题】下列关于剪切力的叙述不正确的是( )。
D.
半坐卧位时床头抬高应大于30°避免剪切力的产生
E.
长期坐轮椅者应保持正确坐姿,防止身体下滑而产生剪切力
【简答题】I haven't set up the buffet. 如何讲语言更加软化委婉?
【单选题】听力原文:W: I haven't seen Mike for years. How is he getting along? M:I came across him in the street only yesterday and he told me that he was having trouble with his new business. W: He has set up anoth...
C.
In the street yesterday.