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

<sup id="vamo4"><legend id="vamo4"><s id="vamo4"></s></legend></sup><ruby id="vamo4"><xmp id="vamo4"></xmp></ruby>

單項選擇題

The magnetic compass magnets are acted on by the horizontal component of the Earth’s total magnetic force. This magnetic force is GREATEST at the（）.

A.north magnetic pole
B.south magnetic pole
C.magnetic prime vertical meridian
D.magnetic equator

你可能感興趣的試題

單項選擇題

The lubber’s line on a magnetic compass indicates（）.

A.compass north
B.the direction of the vessel's head
C.magnetic north
D.a relative bearing taken with an azimuth circle

單項選擇題

The lubber’s line of a magnetic compass（）.

A.always shows true north direction
B.indicates the vessel's heading
C.is always parallel to the vessel's transom
D.is located on the compass card

<ruby id="0l8sn"><small id="0l8sn"><b id="0l8sn"></b></small></ruby>