【单选题】ZPW-2000R型无绝缘轨道电路在最不利条件下,用0.15Ω标准分路线分路,主轨道无分路死区段。调谐区分路死区段不大于()。
【单选题】ZPW-2000R型无绝缘轨道电路调谐区内发送调谐单元处用0.15Ω标准分路线分路时,调接入分路电压应不大于( ):
【单选题】ZPW-2000R型无绝缘轨道电路在最不利条件下,用0.15 Ω标准分路线分路,主轨道无分路死区段。调谐区分路死区段不大于( ):
【单选题】British banks move their headquarters to South Africa because ______.
A.
South Africa is a safer country compared with others in Africa
B.
South Africa is gradually becoming a financial center in Africa
C.
South Africa offers preferential banking terms to foreign banks
D.
South Africa is a platform. in Africa for the American investors
【判断题】ZPW-2000R型无绝缘轨道电路在最不利条件下用0.15Ω标准分路电阻线分路,主轨道无分路死区段;调谐区分路死区段不大于5m。
【简答题】In Africa, thereare a lot of children suffering from ______(severity) malnutrition.
【单选题】沈先生,60岁。吸烟25年,患慢性支气管炎15年,近6个月来活动后气促明显,3日前由于天气突变,咳嗽加重,痰多,粘稠不易咳出。目前患者最主要的护理诊断是:
【简答题】防范 离职手续办理的 法律风险 应注意哪些问题?
【单选题】Africa's elephants are divided between the savannahs of eastern and southern Africa and the forests of central Africa. Some biologists reckon the forest ones-smaller, with shorter, straighter tusks-ma...
A.
Biological evidences are insufficient to support this point of view.
B.
The high price of ivory entices more killings of elephants.
C.
Their number is too small to be of a species.
D.
A serious disease broke out among the elephants and sharply decreased their number.