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  3. Unbelievable as it sounds, a rain of fish did actually occur in 1817, at Appin, Scotland. It consisted of a downpour for small h

Unbelievable as it sounds, a rain of fish did actually occur in 1817, at Appin, Scotland. It consisted of a downpour for small h

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问题    Unbelievable as it sounds, a rain of fish did actually occur in 1817, at Appin, Scotland. It consisted of a downpour for small herrings(青鱼), a feat that nature repeated in 1830, at Islay, in Argyllshire. Some sixty years ago there was a shower of small frogs in the west of England and in 1900 a thunderstorm brought down more of the creatures near Liverpool. Even this doesn’t exhaust the marvels of nature, for many other curious effects have been connected with rainfall. For example, there was a Shower of red rain in 1608 at Aix, during which large red drops of liquid were on the cemetery and the walls of the church. Needless to say, this "shower of blood” was not taken lightly by the frightened inhabitants. Red rain has been recorded many times since then, for instance at Vienna and in Italy in 1901, in Cornwall and Hamburg in 1902, and in England in 1903. The explanation probably lies in the fact that large quantities of algae(海藻)were brought down by the rain. Algae are tiny plants measuring less than one-thousandth of an inch in diameter the simplest forms of vegetable life.
    Black rain is another oddity that has visited the British Isles. In 1862, four showers of black rain fell in Scotland. They were probably the result of volcano dust brought to earth from the higher atmosphere. Yellow rain has also been recorded and pollen is suspected of being the coloring agent.
   While such curiosities of nature are startling, they all have natural explanations. The herrings—and small ones at that—were probably picked up by a waterspout at sea. The frogs probably enjoyed a similar experience as a result of a whirlwind, either from a swamp or from a meadow. In any event, no rainstorms of. fish of frgs have been recorded far from either seacoasts or swampland.
The main idea of this passage is that______.
选项 A、a rain offish actually occurred in 1817, at Appin, in Scotland
B、many curious but natural effects have been connected with rainfall
C、black rain is an oddity that has visited the British Isles
D、all curiosities of nature have natural explanations
答案B
解析 本文的主要内容是，许多奇异的自然现象一直与降雨有关的，故正确选择是[B] 。
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