Spreading oil on the open sea has the effect of().
A. diminishing the height of the seas
B. lengthening the distance between successive crests
C. increasing the height of the seas
D. preventing the wave crests from breaking
ZPW-2000A无绝缘轨道电路应能实现全程断轨检查,小轨道断轨时,“轨出2”电压不大于(),轨道继电器可靠落下。
A. 43mV
B. 53mV
C. 63mV
D. 73mV
一般来说,证券买卖委托受理过程包括()。 Ⅰ.验证 Ⅱ.审单 Ⅲ.查验资金及证券 Ⅳ.调查投资风险承受能力
A. Ⅱ、Ⅲ、Ⅳ
B. Ⅰ、Ⅱ、Ⅲ
C. Ⅰ、Ⅱ、Ⅳ
D. Ⅰ、Ⅲ、Ⅳ