设是由锥面与半球面围成的空间区域，是的整个边界的外侧，则（　　）。

A、<img width="84" height="41" src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/e4b4e0c9-1ee3-4bc1-9809-be7d168528c2.png" />

B、<img width="75" height="40" src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/57d02b97-5bf1-4d78-9a3b-670ca373c69f.png" />

C、<img width="88" height="42" src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/93f9de18-2228-4433-9bb0-da3721988d9d.png" />

D、<img width="84" height="42" src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/92a32674-0c13-48df-bd0c-cde1dbdac1da.png" />