航海英語海上天氣現(xiàn)象單項選擇題每日一練(2019.01.16)

來源：考試資料網(wǎng)

1 Snow has obliterated surface features and the sky is covered with uniform，altostratus clouds. There are no shadows and the horizon has disappeared. What is this condition called? （）

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2 Cumulus clouds that have undergone vertical development and have become cumulonimbus in form，indicate（）.

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3 Cumulonimbus clouds are formed by（）.

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4 Early indications of the approach of a hurricane may be all of the following EXCEPT（）.

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5 Plain language is usually used on marine weather（）.

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