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

<blockquote id="9xjpy"><pre id="9xjpy"></pre></blockquote>

單項選擇題

In the horizon system of coordinates what is equivalent to latitude on the Earth?（）.

A.Altitude
B.Zenith
C.Declination
D.Zenith distance

你可能感興趣的試題

單項選擇題

In the horizon system of coordinates what is equivalent to the equator on the Earth?（）.

A.Prime vertical circle
B.Principal vertical circle
C.Parallels of altitude
D.Horizon

單項選擇題

In order for a star to be used for a sight at lower transit，the star must（）.

A.be circumpolar
B.have a declination equal to or greater than your latitude
C.have a GHA of 180°
D.have the SHA equal to or less than the LHA