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

<strong id="bykyt"><ul id="bykyt"><legend id="bykyt"></legend></ul></strong>

<em id="bykyt"></em>

單項選擇題

A tall object with a light on or near the shore，to act as a guide or warning to mariners is called（）.

A.beam
B.radar
C.light beacon
D.reflector

你可能感興趣的試題

單項選擇題

A radar range to a small，charted object such as a light will provide a line of position in which form?（）.

A.Straight line
B.Arc
C.Parabola
D.Hyperbola

單項選擇題

A radar display which is oriented，so that north is always at the top of the screen，is called a(n)（）.

A.relative display
B.composite display
C.stabilized display
D.unstabilized display

<em id="byb7c"></em>