Dear Sir,
After reading some of the letters printed in this newspaper, I'm beginning to believe that the carbon monoxide in this city's air during the past year has already affected some people's ability to think straight.
The proposal for limiting the use of ears seems fair and reasonable to me. I can't feel that it will produce any real suffering on the part of motorists, who sometimes seem to put their rights to drive above the public's right to breathe.
Surely everyone understand that it would be worse to have to wear gas masks in our city than to ride buses or trains. After all, breathing is necessary, and we might all breathe more easily ff we could reduce the amount of pollution in our air.
The letters referred to in the first paragraph must have ______.
A.complained that carbon monoxide had affected their own ability to think
B.complained that carbon monoxide had affected other people's ability think
C.opposed the limiting of the use of cars
D.proposed the limiting of the use of cars
第1题
A.给蒸发器直接加热,且保证麻醉药液不受破坏
B.蒸发室内装吸收芯,并将其下部浸泡于麻醉液体中
C.将气体通入麻醉液体中,增加接触面积
D.增加麻醉药液表面气流量
E.给蒸发器间接加热
第2题
麻醉蒸发器中吸液芯的作用是
A、储存麻醉药液
B、保持蒸发室湿度
C、保持蒸发室温度
D、稳定载气的流速
E、增加蒸发表面积
第3题
麻醉蒸发器其室内吸液芯的作用是
A.稳定载气的流动
B.保持蒸发室温度
C.增加麻醉药液的蒸发面积
D.储存麻醉药液
E.节省吸入麻醉药
第4题
第8题
A.满液式蒸发器的传热性能优于干式蒸发器
B.蒸发管外侧的换热系数得到提高
C.位于蒸发器底部的蒸发管的蒸发压力低于蒸发器上部蒸发管的蒸发压力
D.位于蒸发器底部的蒸发管的蒸发压力高于蒸发器上部蒸发管的蒸发压力
第9题
A.满液式蒸发器的传热性能优于干式蒸发器
B.蒸发管外侧的换热系数得到提高
C.位于蒸发器底部的蒸发管的蒸发压力低于蒸发器上部的蒸发管的蒸发压力
D.位于蒸发器底部的蒸发管的蒸发压力高于蒸发器上部的蒸发管的蒸发压力
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