天然气与空气混合时,天然气的体积分数在()时,遇明火就会爆炸。
A.3%~10%
B.5%~15%
C.5%~20%
D.5%~25%
参考答案:B
This is not my story, nor ______ the whole story. My story plays out differently. [ ]
A. is there
B. there is
C. is it
D. it is
防止急性肾衰竭时的高钾血症,下列说法错误的是:()
A.彻底清创,预防感染
B.供应足够能量
C. 适当使用蛋白质合成激素
D.禁含钾食物
E.如有贫血,可输库血