单选题Attention is called to the fact that in many cases pipelines are not （） and charted depths may be decreased by up to 2 meters．AconcealedBburiedCexistedDbuilt
单选题
Attention is called to the fact that in many cases pipelines are not （） and charted depths may be decreased by up to 2 meters．
A
concealed
B
buried
C
existed
D
built
参考解析
解析：
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单选题Attention is called to the fact in many cases pipelines are not buried and charted depth may be decreased（）up to teo meters.AwithBbyConDin
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