转换效率的定义式为激光器的输出（）与消耗的（）的比值。
参考答案：光功率；电功率
As is known to all, _______ opening ceremony of the 16th Asian Games held on November 12th in
Guangzhou was _______ great success.
A．/; a
B．the; a
C．the; /
D．a; /
某企业采用五五摊销法核算低值易耗品，则保险公司在赔偿因保险事故引起的损失时，其赔偿比例为（）。
A.80％
B.50％
C.30％
D.0
