97免费在线观看视频,亚洲综合自拍网,黄色毛片免费观看,热久久综合网,免费看日产一区二区三区狠狠操av,久久久涩涩涩,在线精品免费视频,人人插天天干,久久91精品国产91久久

<ins id="sbocv"><output id="sbocv"></output></ins>

單項選擇題

An azimuth angle for a body is measured from the（）.

A.observer's meridian
B.Greenwich meridian
C.body's meridian
D.zenith distance

你可能感興趣的試題

單項選擇題

An authorized light to assist in the identification of submarines operating on the surface is a(n)（）.

A.blue rotating light
B.intermittent flashing amber/yellow light
C.flashing white light
D.flashing sidelight

單項選擇題

An aneroid barometer on a boat should always be（）.

A.located in an air-conditioned area
B.mounted in the passenger compartment
C.protected by a collision bulkhead
D.permanently mounted

<dl id="oy9l3"><legend id="oy9l3"></legend></dl><pre id="oy9l3"><legend id="oy9l3"></legend></pre>

<pre id="oy9l3"><legend id="oy9l3"></legend></pre>