航海英語(yǔ)航海儀器使用說(shuō)明書(shū)單項(xiàng)選擇題每日一練(2019.01.11)

來(lái)源：考試資料網(wǎng)

1 The radar component that produces the synchronizing signal and triggers the indicator sweep is which of the following?（）.

2 There is a possibility that small vessel，ice and other floating objects may not be（）by radar at an adequate range.

3 The transmission time duration of a single pulse of radio-frequency energy is a function of the（）.

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

5 The microsecond unit of time is used in radar applications. The microsecond represents which of the following?（）.

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