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在线辅导团队特为考生整理了2013年职称英语考试每日一练，供大家练习，祝考试顺利!请大家可随时关注在线职称英语考试动态栏目，我们将第一时间公布相关考试信息。阅读下面的短文，文中有15处空白，每处空白给出4个选项，请根据短文的内容从4个选项中选择1个最佳答案，涂在答题卡相应的位置上。 The Greatest Mystery Of Whales The whale is a warm-blooded，air-breathing animal，giving birth to its young alive，sucking them--and，like all mammals，originated on land.There are many front flippers，used for steering and stability, are traces of feet. __________ . of this.Its Immense strength is __________ . into the great body of the big whales，and in fact most of a whales body is one gigantic muscle.The blue whales pulling strength has been estimated __________ . 400 horsepower.One specimen was reported to have toweda whaling vessel for seven hours at the __________. of eight knot . An angry whale will __________ . A famous example of this was the fate of Whaler Essex, __________ . was sunk off the coast of South America early in the last century.More recently, steel ships have __________ . their plates buckledin the same way.Sperm whaleswere known to seize the old-time whaleboats in their jaws and crush Them. The greatest __________ . of whales is their diving ability.The sperm whale dives to the Bottom for his __________ . food，the octopus.In that search he is known to go as far Down as 3,200 feet, where the. __________ . is 1,400 pounds，to a square inch.Doing so he | 
