B、1.0
C、<strong><em><span style="font-size: 14px;font-family: \'Times New Roman\', serif">x</span></em></strong>
D、<strong><span style="font-size:14px;font-family:\'Times New Roman\',\'serif\'"> <em>lnx </em></span></strong>
C、<strong><em><span style="font-size: 14px;font-family: 'Times New Roman', serif">x</span></em></strong>
D、<strong><span style="font-size:14px;font-family:'Times New Roman','serif'"> <em>lnx </em></span></strong>
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