（）不是致稳气的作用。
A、减少热点产生
B、有效地带出反应热
C、降低氧气、乙烯的爆炸极限
D、抑制副反应
参考答案：D
41. If it ______ for the fence, he ______ into the river.
A. were not; fallen B. had not been; could have fallen
C were not; could fall D. had not been; could fall
患者男，40岁，因“食管癌致进食困难1个月余”来诊。乏力、极度口渴、尿少而色深。查体：体温、血压均正常；体重60kg；眼窝凹陷，舌干燥，皮肤弹性差。
该患者当天补液量约为（）（不包括当天生理需水量）
A.500ml
B.1000ml
C.3000ml
D.4000ml
E.4500ml
