【单选题】客户采购了一台路由器,如果此路由器性能指标为平均无故障工作时间MTBF>Y14 8年,平均维修时间MTTR
【判断题】润滑剂具有润滑、冷却、防锈、洗涤、密封、缓冲和吸振作用。
【单选题】听力原文: I grew up in a small town. My father raised chickens and ran a construction company. I was barely 10 years old when my dad gave me the responsibility of feeding the chickens and cleaning up the ...
A.
Because he was a cook at a country-music club.
B.
Because he performed for guests while he worked as a cook.
C.
Because he often sang while cooking.
D.
Because he liked singing better than cooking.
【单选题】听力原文: I grew up in a small town. My father raised chickens and ran a construction company. When I was 10 years old, my dad gave me the responsibility of feeding chickens and cleaning up the stable. He...
C.
When he was known as a singing cook.
D.
After he found a job in New York.
【判断题】润滑剂具有润滑、冷却、防锈、洗涤、密封、缓冲和吸振作用。A. 对 B. 错
【单选题】客户采购了一台路由器设备,如果此路由器性能指标为平均无故障工作时间MTBFW5000,平均维修时间MTTRSOQ 5则此路由器可靠性为: