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【单选题】
我们有很多的()是被建构起来的。A.
需要
B.
认知
C.
行为
D.
情感
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A.
fill the unit with saltwater
B.
fill the unit with de-scaling compound
C.
completely drain the unit
D.
tightly seal the unit to exclude air
【简答题】* 某一套管换热器的内管为 165mm* 4.5mm 的钢管,内管中热流体被冷却,热流体流量为 3000kg·h -1 ,比热容为 1.87kJ·kg -1 ·K -1 ,进、出口温度分别为 90 °C、 60 °C,环隙中冷却水进出口温度分别为 20 °C和 45 °C,水的比热容为 4.187kJ·kg -1 ·K -1 ,总传热系数 K 为 1600 W·m -2 ·K -1 (以外表面为基...
【单选题】It came as something of a surprise when Diana, Princess of Wales, made a trip to Angola in 1997 , to support the Red Cross's campaign for a total ban on all anti-personnel landmines (地雷) . Within hour...
A.
to voice her support for a total ban of landmines
B.
to clarify the British government's stand on landmines
C.
to investigate the sufferings of landmine victims there
D.
to establish her image as a friend of landmine victims
【单选题】It came as something of a surprise when Diana, Princess of Wales, made a trip to Angola in 1997, to support the Red Cross's campaign for a total ban on all anti-personnel landmines. Within hours of ar...
A.
to clarify the British government's stand on landmines
B.
to establish her image as a friend of landmine victims
C.
to investigate the sufferings of landmine victims there
D.
to voice her support for a total ban of landmines
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