问题
单项选择题
The net productivity per gang-hour can be improved through a decrease of（）.
A.cranes/derricks
B.crane/derrick cycles
C.crane/derrick cycle time
D.weight per package
答案
参考答案：C
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The net productivity per gang-hour can be improved through a decrease of（）.
A.cranes/derricks
B.crane/derrick cycles
C.crane/derrick cycle time
D.weight per package
参考答案：C