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【多选题】
承诺生效的条件不正确的是( )A.
承诺通知 发出时
B.
承诺通知到达要约人时
C.
承诺人同意时
D.
承诺人签
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【单选题】Remember that this special offer _________ on May 1st.Don't miss it!
A.
expires
B.
completes
C.
finishes
D.
goes
【简答题】某燃气轮机装置定压加热循环,循环增压比 π= p 2 / p 1 =12 ,增温比 τ = T 3 / T 1 =5 ,压气机吸入环境空气,压力 p 1 =0.1MPa , t 1 =27°C ,燃气透平相对内效率 η T = 0.9 ,其余过程可视为可逆过程。若空气取定比热,其 c p =1.004 kJ/(kg·K) , R g =0.287 kJ/(kg·K) , κ =1.4 。试求循环吸...
【简答题】个人独资企业解散后，其财产不足以的，投资人应当以其个人的其他财产予以清偿。仍不足清偿的，投资人应当以其家庭共有财产予以清偿。（ ）
【单选题】It is important to remember that an inerted atmosphere may become flammable again if air is admitted _________.
A.
during routine measuring
B.
on venting the mixture to atmosphere
C.
during gas freeing with air
D.
all of the above
【简答题】某燃气轮机装置定压加热理想循环中，工质视为空气。空气进入压气机时的压力为0.1MPa,温度为17℃。循环增压比π=6.2，燃气轮机进口温度为870K。空气视为理想气体，Cp=1.004KJ/kg*K,k=1.4。试求循环各点的温度、压力、比体积、单位质量工质的循环净功量、循环的热效率
【简答题】某燃气轮机装置定压加热循环(如图所示)，循环增压比π=7，增温比τ=4，压气机吸入空气压力P 1 =0.8MPa、t 1 =17℃。压气机绝热效率η C，s =0.90，燃机轮机相对内效率η T =0.92，空气取定比热容，其c p =1.03kJ/(kg·K)、R g =0.287kJ/(kg·K)、κ=1.3863。试求
【单选题】It is important to remember that an inerted atmosphere may become flammable again if air is admitted______________.
A.
during routine measuring
B.
on venting the mixture to atmosphere
C.
during gas freeing with ai
D.
all of theabove
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