亚硝酸盐中毒的特效解毒剂是（）
A.美蓝
B.镁乳
C.阿托品
D.解磷定
E.氯磷定
参考答案：A
_______ today, he would get there by Saturday. [ ]
A. If he leaves
B. Was he leaving
C. Would he leave
D. Were he to leave
制约我国经济社会可持续、健康发展的重要因素是( )。
A．技术B．环境C．能源D．资金
