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【单选题】
有 220V 、 25W 的电烙铁,其电源控制电路如图所示,烙铁温度最高的是A.
S1、S2均接通
B.
S1断开，S2接通
C.
S1接通，S2断开
D.
S1、S2均断开
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【简答题】怎样将 2D 草图拉伸、旋转、扫掠、蒙皮成为 3D 几何模型?
【简答题】A．Average. B．Extremely had. C．Extremely good. D．There isn't enough information given.
【单选题】Scale accumulation on evaporator heat exchange surfaces （）.
A.
increases brine density
B.
increases distillate salinity
C.
reduces metal corrosion
D.
reduces heat transfer
【简答题】A．especially B．exclusively C．exactly D．extremely
【简答题】A study on the heat insulation coating material for the heat exchange equipment in chemical industry.
【单选题】The boy was extremely embarrassed by his actions.
A.
extremely
B.
embarrassed
C.
his actions
【简答题】Heat-Exchange equipment in chemical industry.
【简答题】Heat Exchange的中文意思是（）。
【简答题】A．precisely B．extraordinarily C．exceedingly D．extremely
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