A、<p><span lang="EN-US" style="font-size: 10.5pt; font-family: 宋体;">50</span><span style="font-size: 10.5pt; font-family: 宋体;">小时</span></p>
B、<p><span lang="EN-US" style="font-size: 10.5pt; font-family: 宋体;">20</span><span style="font-size: 10.5pt; font-family: 宋体;">小时</span></p>
C、<p><span lang="EN-US" style="font-size: 10.5pt; font-family: 宋体;">5</span><span style="font-size: 10.5pt; font-family: 宋体;">小时</span></p>
D、<p><span lang="EN-US" style="font-size: 10.5pt; font-family: 宋体;">2</span><span style="font-size: 10.5pt; font-family: 宋体;">小时</span></p>
E、<p><span lang="EN-US" style="font-size: 10.5pt; font-family: 宋体;">0.5</span><span style="font-size: 10.5pt; font-family: 宋体;">小时</span></p>
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