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    課程推薦：2015職稱英語 鎖定65分 沖擊75分

　　2015年職稱英語理工類B級補全短文練習題(2)

　　Seahorse Fathers

　　It’s true that male seahorses never play catch with their children or help them with their homework.But they do outdo human dads on one count.(1)The trait is unique in these strange and fascinating fish that inhabit tropical and temperate coastal waters worldwide.Seahorses, which range from less than an inch to a foot in length, have evolved a series of unusual adaptations.(2)The male seahorse has a pouch(育兒袋)on its stomach in which to carry babies as many as 2000 at a time.A pregnancy lasts from 10 to 25 days depending on the species.(3) Eventually they engage in a true courtship dance,which can last as long as eight hours.It ends with the female depositing her eggs in the male's pouch.

　　The eggs hatch in the pouch.(4) When the tiny seahorses are ready to be born the male undergoes muscular contractions to expel the young known as"fly"from the pouch.

　　While seahorse dads go the extra mile to give birth the parents do not provide their tiny offspring with any care or protection after they are born.Infant seahorses are susceptible to death from predators(食肉動物)and being swept into ocean currents where they drift away from feeding grounds rich in microscopic organism.(5)

　　A.The father cares for the young as they grow regulating the water salinity(鹽分)in the pouch to prepare them for life in the sea.

　　B.They are such an unusual looking fish that people sometimes don't realize they're real fish.

　　C.Male seahorses undergo pregnancy and give birth to their sons and daughters.

　　D.In spite of all our scientific research, we are only just beginning to understand how the seahorse fathers bear children.

　　E.The reproductive process begins when a male and a female seahorse do daily predawn dances their tails swimming together.

　　F.Fewer than five infant seahorses in every 1000 survive to adulthood which helps explain why the litters are so large.

　　正確答案：CBEAF

　　解析：

　　1.C 上一句話說，海馬爸爸確實勝過人類的爸爸。那么接下來應該說明具體在哪方面勝過人類的爸爸，所以C“雄海馬承擔了懷孕直至到兒女出生這項任務”是正確的選項。

　　2.B 上一句話說，它們已經進化出一系列不同尋常的適應性特征。所以本句應該繼續進行在特征上的表述，即B“它們是外貌如此奇特的魚類，以至于人們往往沒有意識到它們是魚類。”是正確的選項。

　　3.E 這一句說的是“繁殖過程開始時，雌雄海馬像往常一樣在黎明前跳舞，將尾巴交織在一起游泳?！毕乱痪湔美^續說明它們接下來做什么，“最后，它們開始了真正的求婚舞蹈，這一過程可持續長達8個小時”所以E是正確的選項。

　　4.A 前一句說的是受精卵在育兒袋中孵化。接下來應該講的是孵化過程中的事情，所以A“父親照料小海馬的生長發育，為了讓小海馬適應海水中的生活而調節育兒袋中水的鹽分?！笔钦_的選項。

　　5.F 這一段主要講的是小海馬出生之后的事情，即，海馬父母對于孩子疏于照顧而導致好多小海馬早年夭折或者失蹤。從海馬爸爸生孩子和這些小海馬的存活率之間的聯系來看，最后一句應該對小海馬的存活數量加以具體說明并做出總結，點明主題，即“1000只小海馬中只有不到5只能夠長大成熟，這也可以解釋為什么海馬一次繁殖的數目這么大。”

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