The Iceberg Was Only Part ofIt
What doomed the Titanic is well known, at least in outline. On a moonless night of April 15, 1912, the ship hit an iceberg in the North Atlantic ,with 1,500 lives lost.
A century later many people presented new theories to explain the real reason for the disaster. Now two new studies argue that rare states of nature played major roles in the disaster.
The first says Earth’s nearness to the Moon and the Sun — a proximity not matched in more than 1,000 years — resulted in record tides that help explain why the Titanic met with so much ice, including the fatal iceberg.
Recently, a team of researchers found an apparent explanation in the heavens. They discovered that Earth had come unusually close to the Sun and Moon that winter, enhancing their gravitational pulls on the ocean and producing record tides. The rare orbits took place between December 1911 and February 1912 — about two months before the disaster came about. The researchers suggest that the high tides refloated masses of icebergs traditionally stuck along the coastlines of Labrador and Newfoundland and sent them adrift into the North Atlantic shipping lanes.
And a second, put forward by a Titanic historian from Britain, contends that the icy waters created ideal conditions for an unusual type of mirage(海市蜃樓) that hid icebergs from lookouts whose duty was to watch carefully for danger ahead and confused a nearby ship as to the liner’s identity, delaying rescue efforts for hours.
Most people know mirages as natural phenomena caused when hot air near the Earth’s surface bends light rays upward. In a desert, the effect prompts lost travelers to mistake patches of blue sky for pools of water. But another kind of mirage occurs when cold air bends light rays downward. In that case, observers can see objects and settings far over the horizon. The images often undergo quick distortions — not unlike the wavy reflections in a funhouse mirror.
Now, scholars of the Titanic are debating these new theories. Some have different opinions on it. Over all, though, many experts are applauding the fresh perspectives. 
【小題1】The underlined word "It" in the title probably refers to _______.

A．the TitanicB．the cause of the disaster
C．the record tideD．a(chǎn)n unusual mirage
【小題2】According to Theory First, what was the right chain of causes leading to the Titanic’s disaster?
① record tides’ forming and icebergs’ being refloated
② icebergs’ being drifted into the North Atlantic shipping lanes
③ the Earth’s strange closing to the Sun and the Moon
④ increasing of the gravitational force on the ocean
A．①→②→③→④B．②→③→④→①C．④→③→②→①D．③→④→①→②
【小題3】According to Theory Second, the disaster happened to the Titanic mainly because______.
A．the freezing weather made the watcher not be able to watch clear
B．the mirage made the watcher not find icebergs and a nearby ship delay rescuing
C．the mirage on the sea attracted the watcher and made him forget his work
D．the high tides drove the icebergs float so fast that the watcher didn’t respond to them
【小題4】What is the chief function of the sixth paragraph?
A．to explain to the readers the ways of the mirage forming
B．to infer the possibility of the mirage appearing
C．to summarize the various kinds of the mirage
D．to analyze the conditions of the mirage arising
【小題5】This passage is organized generally in the pattern of________.
A．comparison and contrastB．conclusion and proof
C．time and eventsD．definition and classification（分類(lèi))


【小題1】B
【小題2】D
【小題3】B
【小題4】B
【小題5】B  

解析試題分析：
【小題1】考查代詞指代：從第二段的句子：A century later many people presented new theories to explain the real reason for the disaster. Now two new studies argue that rare states of nature played major roles in the disaster. 可知it是指災(zāi)難的原因。選B
【小題2】排序題：從文章的第四段對(duì)第一種理論的描述，可知選D
【小題3】細(xì)節(jié)題：從第五段的內(nèi)容：可知是海市蜃樓使觀(guān)測(cè)者沒(méi)有看見(jiàn)冰山，附近的船沒(méi)有即使救援。選B
【小題4】推理題：文章第六段講述了在寒冷的條件下海市蜃樓出現(xiàn)的可能性。選B
【小題5】文章結(jié)構(gòu)題：文章第一段就說(shuō)了泰坦尼克號(hào)沉沒(méi)的原因，后面就是提出了一些證據(jù)。選B 
考點(diǎn)：考查科普類(lèi)短文
點(diǎn)評(píng)：這篇文章有些抽象，考查題型多樣細(xì)節(jié)題，推理題，主旨題都有，需要結(jié)合上下文提供的語(yǔ)境和信息進(jìn)行概括和判斷。要求較高。

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