What happens to the efficiency of an anchor when it is moved from sand to mud?（）<br>A:The efficiency increases<br>B:The efficiency decreases<br>C:The efficiency remains the same<br>D:The efficiency cannot be determined.

What happens to the efficiency of an anchor when it is moved from sand to mud?（）
A:The efficiency increases
B:The efficiency decreases
C:The efficiency remains the same
D:The efficiency cannot be determined.

出自：海船船员证

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