A、<img width="126" height="36" src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/d46d8981-1a96-46f1-bf02-ab741b86ee1e.png" />
B、<img width="89" height="22" src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/74a5153e-0a6c-47e1-b3b9-99f896ef5b01.png" />
C、<img width="115" height="21" src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/065a9a74-8586-4ecf-91a7-4d0d2383221b.png" />
D、<img width="95" height="26" src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/ccbbe1eb-0334-474e-9670-5538826bfbed.png" />
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的特解是（ ）。