单选题Our heavy derrick has been out of use.（）A我们的重吊已经失控了。B我们的重吊出故障了。C我们的重吊已经不用了。D我们的重吊过期了。
单选题
Our heavy derrick has been out of use.（）
A
我们的重吊已经失控了。
B
我们的重吊出故障了。
C
我们的重吊已经不用了。
D
我们的重吊过期了。
参考解析
解析：
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