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【单选题】Longitude and Latitude The meridians of longitude are imaginary great circles drawn from pole to pole around the earth. By international agreement, the meridian of longitude passing through Greenwich,...
A.
7,000 miles per hour
B.
fifteen degrees in one hour
C.
1/48th of the world’s circumference
D.
twice as far as Polaris
【单选题】Longitude and Latitude The meridians of longitude are imaginary great circles drawn from pole to pole around the earth. By international agreement, the meridian of longitude passing through Greenwich,...
A.
his latitude
B.
his longitude
C.
local time
D.
both his latitude and longitude
【单选题】Longitude and Latitude The meridians of longitude are imaginary great circles drawn from pole to pole around the earth. By international agreement, the meridian of longitude passing through Greenwich,...
A.
his latitude
B.
his longitude
C.
local time
D.
both his latitude and longitude
【单选题】Longitude and Latitude The meridians of longitude are imaginary great circles drawn from pole to pole around the earth．By international agreement, the meridian of longitude passing through Greenwich, ...
A.
his latitude
B.
his longitude
C.
local time
D.
both his latitude and longitude
【单选题】航海上用距离定位时，测距的手段常用雷达或六分仪，下列说法不正确的是（）。
A.
雷达测距存在测量点的误差，因此宜选择有明显特征的物标如装有Remark的固定灯标（塔）
B.
雷达测距存在测量点的误差，因此宜选择有明显特征的物标如孤立的小岛
C.
用六分仪测距也存在测量点（物标岸线）的误差，因此应选择陡峭、岸距小的物标，并且只能在白天能见度较好的情况下观测
D.
用六分仪测物标垂直角求距离时，物标高度应是海图上高程值
相关题目：
【单选题】Longitude and Latitude The meridians of longitude are imaginary great circles drawn from pole to pole around the earth. By international agreement, the meridian of longitude passing through Greenwich,...
A.
7,000 miles per hour
B.
fifteen degrees in one hour
C.
1/48th of the world’s circumference
D.
twice as far as Polaris
【单选题】Longitude and Latitude The meridians of longitude are imaginary great circles drawn from pole to pole around the earth. By international agreement, the meridian of longitude passing through Greenwich,...
A.
his latitude
B.
his longitude
C.
local time
D.
both his latitude and longitude
【单选题】Longitude and Latitude The meridians of longitude are imaginary great circles drawn from pole to pole around the earth. By international agreement, the meridian of longitude passing through Greenwich,...
A.
his latitude
B.
his longitude
C.
local time
D.
both his latitude and longitude
【单选题】Longitude and Latitude The meridians of longitude are imaginary great circles drawn from pole to pole around the earth．By international agreement, the meridian of longitude passing through Greenwich, ...
A.
his latitude
B.
his longitude
C.
local time
D.
both his latitude and longitude
【单选题】航海上用距离定位时，测距的手段常用雷达或六分仪，下列说法不正确的是（）。
A.
雷达测距存在测量点的误差，因此宜选择有明显特征的物标如装有Remark的固定灯标（塔）
B.
雷达测距存在测量点的误差，因此宜选择有明显特征的物标如孤立的小岛
C.
用六分仪测距也存在测量点（物标岸线）的误差，因此应选择陡峭、岸距小的物标，并且只能在白天能见度较好的情况下观测
D.
用六分仪测物标垂直角求距离时，物标高度应是海图上高程值
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