为了使硫铵装置蒸发工段节省蒸气，硫铵密度应控制稍微高一些。
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氢分压对柴油产品质量的影响，随着氢分压的降低，十六烷值（）
A. 降低
B. 升高
C. 无显著影响
D. 不确定
During startup, the router displays the following error message: boot: cannot open "flash:" What will the router do next?（）
A. Because of damaged flash memory， the router will fail the POST
B. It will attempt to locate the IOS from a TFTP server. If this fails， it will initiate the setup dialog.
C. It will attempt to locate the IOS from a TFTP server. If this fails， it will load a limited IOS from ROM
D. It will attempt to locate the configuration file from a TFTP server. If this fails， it will initiate the setup dialog.
E. It will attempt to locate the configuration file from a TFTP server. If this fails， it will load a limited configuration from ROM
对于同站场设有连续多架发车进路的车站，当发车进路及出站信号机故障时，则每架信号机前（）停车输入绿色许可证编号及相关内容。
A. 无需
B. 必须
C. 可以
布草洗涤种类可划分五大类，分别是床上用品类：床单、床罩、被套、枕套类、浴衣。毛巾类产品：面巾、浴巾、方巾、地巾、浴袍等。大布草台布、椅子套、沙发套等
A. 正确
B. 错误
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