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【单选题】
下列哪种固定只用于传递转矩不大的场合A.
键
B.
花键
C.
销
D.
紧定螺钉
拍照语音搜题，微信中搜索"皮皮学"使用
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】[9-4]Who checks the bridge clock for accuracy each day ___. #谁每天校验船钟的准确性
A.
Third officer 三付
B.
Second officer 二付
C.
Chief officer 大付
D.
Assistant officer 驾助
【单选题】Who checks the bridge clock for accuracy each day?( )。
A.
third officer
B.
second officer
C.
chief officer
D.
assistant officer
【单选题】【单选】Who checks the bridge clock for accuracy each day?
A.
Third officer
B.
Second officer
C.
Chief officer
D.
Assistant officer
【单选题】Who checks the bridge clock for accuracy each day（）.
A.
Third officer
B.
Second officer
C.
Chief officer
D.
Assistant officer
【简答题】IEEE 802.11b定义了使用跳频扩频技术的无线局域网标准，它的最高传输速率可以达到【 】Mbps。
【单选题】[9-4]Who checks the bridge clock for accuracy each day ___.
A.
Third officer
B.
Second officer
C.
Chief officer
D.
Assistant officer
【简答题】IEEE 802.11b定义了使用跳频扩频技术的无线局域网标准，它的最高传输速率可以达到11Mbps。802.11a将传输速率提高到______Mbps。
【单选题】11b定义了使用跳频扩频技术的无线局域网标准，传输速率为1mbps，2mbps，5.5mbps( )。
A.
10mbps
B.
11mbps
C.
20mbps
D.
54mbps
【单选题】Who checks the bridge clock for accuracy each day?（）.
A.
Third officer
B.
Second officer
C.
Chief officer
D.
Assist nt officer
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