<samp id="fsxia"><del id="fsxia"><menuitem id="fsxia"></menuitem></del></samp>

<code id="fsxia"><div id="fsxia"><dl id="fsxia"></dl></div></code>

單項(xiàng)選擇題

Lines on a chart which connect points of equal magnetic variation are called （）.

A.magnetic latitudes
B.magnetic declinations
C.dip
D.isogonic lines

你可能感興趣的試題

單項(xiàng)選擇題

Many of the soundings shown on the chart are derived from （）.Undue reliance should not be placed upon them．

A.complete and often very poor surveys
B.correct and often very good surveys
C.inadequate and often very old surveys
D.adequate and present surveys

單項(xiàng)選擇題

On this chart only the principle （） to navigation are shown．

A.equipment's
B.tools
C.apparatus
D.aids

感谢您访问我们的网站，您可能还对以下资源感兴趣：

精品伊人久久大香线蕉男人的天堂

国产午夜精品福利久久无遮挡h纯内动漫在线观看国产偷窥盗摄网站国产亚洲精品无码颜射老妇