低渗性缺水的症状时不出现下列哪种
A.直立性晕倒
B.疲乏、头晕
C.手足麻木
D.血压下降
E.常有口渴
参考答案:E
下列物质中,既有可燃性,又有还原性的气体是( )
A.一氧化碳
B.二氧化碳
C.碳
D.氧气
Radiotelegrams requesting medical advice should state briefly and clearly the symptoms of the illness of the person().
A.affected
B.effected
C.affecting
D.effecting