If the diesel fuel vapors present are within the flammable range （）. ["the vapor air mixture is too rich to burn","an explosion may occur if a source of ignition is present","the vapor air mixture is too lean to bum the upper explosive","limit has been exceeded"]
亚洲气候大陆性强烈有哪些表现？是什么原因造成的？
在紫荆的花结构中，位于最外侧的花瓣是：（） ["旗瓣","翼瓣","龙骨瓣","盔瓣"]
Before attempting to put out a class “C” fire involving an electric-driven centrifugal pump, you should FIRST （）. ["insulate your shoes","ground the fire hose","secure its power supply","start the fire pum"]
以下哪种植物最鲜艳的部分不是来源于花结构：（） ["合欢","一品红","玉叶金花","蝴蝶兰"]
亚洲矿藏资源的形成与分布和地质构造有什么关系？
