问题：
[单选题]某车间有甲．乙两台机床，已知甲机床停机的概率为0.06，乙机床停机的概率为0.07，甲．乙两车床同时停机的概率是（ ）
A、0.13
B、0.0042
C、0.03
D、0.04
参考答案：
B
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