A、<img width="89" height="34" id="图片 1" src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/cc27d9b3-4c5d-4457-a955-6fa40d20bd68.png" />
B、<img width="72" height="28" src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/7cd33f25-9476-4aec-85c5-6e3850771f21.png" />
C、<img width="102" height="33" src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/e63c57ce-2d22-4c93-8b0b-aece2f0ddfa8.png" />
D、<img width="61" height="24" src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/2e2cdef1-2826-442b-a5a2-7e9a08d1fef4.png" />