(海葵) may look like the beautiful flower for which it's named，but fish that swim too close may regret it.The sea anemone，which lives on the sea floor，uses its poisonous tentacles (触须) to stab passing creatures with a kind of poison—making them helpless and fit to be eaten.

　　The surgeonfish (刺尾鱼) is an attractive reef fish that is poisonous.Scientists believe that the world's seas hold some 1，200 different surgeonfish species and think that they injure about 50，000 people per year.But the surgeonfish poison can also bring great benefit—they are useful in the development of new drugs.

　　【语篇解读】　本文介绍了5种危险的海洋生物。

　　1．The underlined phrase

　　“break cover”

　　in Paragraph 2 probably means ________．

　　A．jump out of

　　B．break away from

　　C．get away from

　　D．go back to

　　答案　A　[词义猜测题。根据后文“once in the air”可知，needlefish在空中的时候会变成危险的飞剑，由此可以猜测画线短语的意思应该是“跳出(离)”之意。]

　　2．How many attacks on humans do great white sharks do every year?

　　A．About 26.

　　B．About 45.

　　C．About 60.

　　D．About 75.

　　答案　B　[细节理解题。根据第四段“These sharks are responsible for a third to a half of the 100 shark attacks on humans every year.”可知，大白鲨每年袭击人类次数大约为33～50次左右。

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