当前位置：在线题库搜索＞[单选题]高于超声频率上限的超高频声波称为( )。的答案是什么？
问题：
[单选题]高于超声频率上限的超高频声波称为( )。
A、次声
B、特超声
C、超声
D、可听声
参考答案：
B
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- ● Should any cae or upected cae of quarantinable dieae，or any cae of eruptive dieae or any death be dicovered，the local Quarantine Officer mut be（）immediately.
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