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【多选题】
涡轮喷气发动机规定的工作状态中,严格限制工作时间的有( )A.
起飞状态
B.
额定状态
C.
巡航状态
D.
慢车状态
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皮皮学刷刷变学霸
举一反三
【单选题】If you meet a task that is too hard for you, you will ______________.
A.
not ask for any help from others and try to do it by yourself
B.
give it up immediately
C.
get additional manpower, equipment and support
D.
try to complete a task by your own in any case, so as to reduce the cost
【单选题】下列说法中对于燃气轮机启动过程中可能发生的 “热悬挂”现象描述正确的是( )
A.
原因在于启动过程线离喘振边界线太近
B.
一般发生在启动机脱扣之前
C.
如果适当增加燃料量，可使转速上升
D.
放气阀的开和关对 “热悬挂”无影响
【简答题】选择热继电器时,主要根据所保护电动机的额定电流来确定热继电器的 和热元件的 。
【单选题】______ , he always tries his best to complete it on time.
A.
However the task is
B.
However hard the task is
C.
Though hard the task is
D.
Though hard is the task
【简答题】No task is too hard. No amount of is too long or too difficult.
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