A．<br /><img src="https://imgtest.ppkao.com/ExamPaperRes/2011/5/3/96f9ee646dff4166b4376fd3a032fd23/44e4575e-1ab2-405e-afc7-d35be0dab71f.jpg">
B．<br /><img src="https://imgtest.ppkao.com/ExamPaperRes/2011/5/3/96f9ee646dff4166b4376fd3a032fd23/12f12c2d-1a72-4a55-b82f-d6d29b20ee7a.jpg">
C．82
D．81