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共用题干 The Greatest Mystery of Wha1egThe whale is a warm一blooded,air-breathing...
共用题干 The Greatest Mystery of Wha1egThe whale is a warm一blooded,air-breathing...
admin
2020-12-24
14
问题
共用题干
The Greatest Mystery of Wha1eg
The whale is a warm一blooded,air-breathing animal,giving birth to its young alive,sucking them一and,
like all mammals,originated on land. There are many__________(51)of this. Its front flippers (鳍状肢),
used for steering and stability,are traces of feet.
Immense strength is________(52)into the great body of the big whales,and in fact most of a
whale',body is one gigantic muscle.The blue whale'S pulling strength has been estimated________.(53)
400 horsepower. One specimen was reported to have towed(拖)。whaling vessel for seven hours at the
_______(54)of eight knot(节).
An angry whale will________(55).A famous example of this was the fate of Whaler Essex,
________(56)was sunk off the coast of South America early in the last century.More recently,steel ships
have_(57)their plates buckled(使弯曲)in the same way. Sperm whales(抹香鲸)were known
to seize the old-time whaleboats in their jaws and crush them.
The greatest________(58)of whales is their diving ability.The sperm whale dives to the bottom for
his________(59)food,the octopus(章鱼),In that search he is known to go as far down as 3 , 200 feet,
where the________(60)is 1,400 pounds,to a square inch.Doing so he will________(61)underwa-
ter as long as one hour. Two special skills are involved in this storing up enough________(62)(all
whales are air-breathed)and tolerating the great change in pressure.Just how he does it scientists have not
_________(63).It is believed that some of the oxygen is stored in a special________(64)of blood
vessels,rather than just held in the lungs.And it is believed that a special kind of oil in his head is some sort
of a compensating mechanism that_________(65)adjusts the internal pressure of his body.But since you
can't bring a live whale into the laboratory for study,no one knows just how these things work.
选项
_________(59)
A:favorite
B:fast
C:new
D:gufficient
答案
A
解析
第一段讲到鲸鱼很像陆地上的哺乳动物,最后一句举了一些例子来说明这一点。sign 的意思是“符号,特征,迹象”,鲸鱼具有陆地上哺乳动物的一些特征,故选B。
something is built into…的意思是“把……装(建、插)入……”,这里指鲸鱼具有巨大的 气力。其他几个选项意思上讲不通。
at表示“(速度、比率等)以,达”;horsepower表示“马力”。
rate表示“速度”,从上下文来讲,选D意思才讲得通。
此题亦必须根据上下文的意思来推测选哪个词。鲸鱼被惹怒后会攻击船只,所以选B。
这里是一非限制性定语从句,关系代词作主语,用which,故选C。
"have + something+过去分词”是一固定结构。
本题所在句子为该段主题句,谈的是鲸鱼的潜水能力。鲸鱼的潜水能力很强,能下潜 到很深的地方,科学家们不解,所以说是个谜,故选D。
虽然本题的几个选项都能与food搭配,但从上下文意思来讲,只有A正确。
空格后面说的是每平方英寸1400磅,这指的是压强,故选B。
待在水下要用动词remain,其他几个动词放人空格处意思讲不通。
此题也必须在读懂上下文意思的基础上才能作出判断,这里指鲸鱼储存氧气,故选D。
上文谈到鲸鱼为什么能够在水下承受巨大的压力,科学家们还没有找到答案。选项中 的determine的意思是“确定”,此词放入空格处意思讲得通,其他几个选项讲不通,故选B。
special虽然和几个选项都能搭配使用,但只有选项A意思上讲得通,故A为正确答案, 此处是指氧气存在特殊的血管系统中。
此题亦需根据上下文的意思作出判断。automatically的意思是“自动地”。
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