石灰岩主要靠（）储藏油气。 ["孔隙","孔洞","裂缝","裂缝和洞穴"]
What does the value returned by the method getID（） found in class java.awt.AWTEvent uniquely identify？（） ["The particular event instance.","The source of the event.","The set of events that were triggered by the same action.","The type of event.","The type of component from which the event originated."]
下列诗歌中属于绝句的是（）。 ["《饮酒》","《行路难》","《山区秋暝》","《泊秦淮》"]
二分类变量
假设要推广“整形网”这个关键词让排名靠前，最能达到效果的是？（） ["“写和整形相关的文章500篇，发布外部链接100个，外部链接关键词“爱美整形网””","“写和整形相关的文章100篇，发布外部链接500个，外部链接关键词“整形美容网””","“写和整形相关的文章500篇，发布外部链接100个，外部链接关键词“整形网””","“写和整形相关的文章100篇，发布外部链接500个，外部链接关键词“整形网”&rdquo"]
硬膜外阻滞麻醉，麻醉平面的调节主要决定于哪些因素？
