航海英語航海學(xué)基本知識單項選擇題每日一練(2019.01.09)

來源：考試資料網(wǎng)

1 A white buoy with an open-faced orange diamond on it indicates（）.

2 A light that has a light period shorter than its dark period is described as（）.

3 A white buoy with an orange rectangle on it displays（）.

4 A gnomonic projection is based on a(n)（）.

5 A white buoy with a blue band is（）.