【单选题】
A <{p}><{font _mstmutation="1" _msthash="20545" _msttexthash="47682128"}>空气压缩机输出流量太多<{/font}><{br/}><{/p}>
B <{p}><{font _mstmutation="1" _msthash="20546" _msttexthash="39695318"}>速度控制阀的开度太小<{/font}><{br/}><{/p}>
C <{p}><{font _mstmutation="1" _msthash="20547" _msttexthash="13320671"}>管路太短<{/font}><{br/}><{/p}>
D <{p}><{font _mstmutation="1" _msthash="20548" _msttexthash="41256189"}>减压阀的输出压力太高<{/font}><{br/}><{/p}>
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