无码高清视频|成人自拍视频|欧美成人午夜无码A片秀色直播|草美女视频网站|美女被操网站在线观看

<dl id="jqjei"></dl>

<pre id="jqjei"><acronym id="jqjei"></acronym></pre>

<pre id="jqjei"><strong id="jqjei"></strong></pre>

<em id="jqjei"></em>

<dl id="jqjei"></dl>

單項選擇題

The receiver uses（）satellites to compute latitude，longitude，altitude，and velocity．

A.one
B.two
C.three
D.four

你可能感興趣的試題

單項選擇題

The operator of the ship’s radiotelephone，if the radiotelephone is carried voluntarily，must hold at least a（）.

A.Mate's license
B.Restricted radiotelephone operator permit
C.Second-class radio operator's license
D.Seaman's document

單項選擇題

The operation of which aids to navigation may be suspended during war or national emergency（）.

A.Navigational satellites
B.Loran
C.Omega
D.Any of the above

<ruby id="ikerm"><output id="ikerm"></output></ruby>