Each ship having an inert gas system must have a portable instruments to measure concentrations of hydrocarbon vapor in inert atmospheres and also to measure().
A. nitrogen
B. oxygen
C. carbon dioxide
D. water vapor
某市推出“自住型商品房”,意在()涨价预期,但由于自住型商品房用地进一步()了普通商品房用地,使得商品房地价一再上涨。
A. 平抑;缩减
B. 制止;挤压
C. 抑制;压缩
D. 平抑;挤压
《铁路信号维护规则》ZD6转辙机内挤切销和连接销型号的使用是如何规定的?
处理突出事故时,进入灾区前,确保()完好;进入灾区内,不准随意启闭电气开关和()开关或灯盖。