Question

Most of us are used to seasons. Each year, spring follows winter, which follows autumn, which follows summer, which follows spring. And winter is colder than summer. But the earth goes through temperature cycles over much longer periods than those that we experience. Between 65,000 and 35,000 years ago, the planet was much colder than it is now. During that time the temperature also changed a lot, with periods of warming and cooling. Ice melted during the warm periods, which made sea levels rise. Water froze again during the cold periods.
A new study from Switzerland, sheds light on where ice sheets melted during the ice age. It now seems that the ice melted at both ends of the earth, rather than just in either northern or southern regions.
This surprised the researchers from the University of Bern. Scientists have long assumed that most of the ice that melted was in the Northern hemisphere(半球) during the 30,000-year long ice age. That belief was held because the North Pole is surrounded by land, while the South Pole is surrounded by the Antarctic Ocean. It is easier for ice sheets to grow on land. If surrounded by sea the ice can easily just slip into the ocean instead of building up.
The researchers used a computer model to look at ways the ice could melt and how it might affect sea levels. They compared these results to evidence of how temperatures and currents actually changed during that time. The model showed that if it was only in the Northern hemisphere that ice melted, there would have been a bigger impact(影響) on ocean currents(洋流) and sea temperatures than what actually happened. Studies suggest that melting just in the Southern hemisphere would have been impossible, too. The only reasonable conclusion, the scientists could make, was that ice melted equally in the North and the South.
It is still a mystery as to what caused the temperature changes that caused the ice to melt.
【小題1】The North Pole is surrounded by land, while the South Pole is surrounded by the Antarctic Ocean. So scientists thought that ________.

A．most of the ice melted in the Northern hemisphere

B．most of the ice melted in the Southern hemisphere

C．The North Pole is colder than South Pole

D．The South Pole is colder than North Pole

【小題2】We can infer from the passage ________.

A．the ice can easily just slip into the ocean

B．volcanoes caused the ice to melt

C．melting just in the Northern hemisphere would have been impossible

D．researchers often use the computer models help their research work.

【小題3】The scientists are not sure ________.

A．how long the ice age lasted

B．where ice sheets melted during the ice age

C．what caused the temperature changes

D．what the earth is made up of

【小題4】Which of the following is the best title for the passage?

A．A computer model

B．Studies show ice melted equally in the North and the South during the ice age

C．Most of the ice melted in the Northern hemisphere during the 30,000-year long ice age.

D．A survey result

Answer 1

【小題1】A
【小題2】C
【小題3】C
【小題4】B

解析試題分析：
【小題1】細(xì)節(jié)題。根據(jù)第 3 段第 2,3 句 scientists have long assumed that most of the ice that melted was in the northern hemisphere during the 30,000-year long ice age. that belief was held because the north pole is surrounded by land… 可知答案。選A。
【小題2】推理判斷題。根據(jù)第 4 段最后兩句可 studies suggest that melting just in the southern hemisphere would have been impossible, too. the only reasonable conclusion… 可知冰川既不可能只在南半球融化，也不可能只在北半球融化。故答案為 C。
【小題3】細(xì)節(jié)題。根據(jù)文章最后一句 it is still a mystery as to what caused the temperature changes that caused the ice to melt 可知科學(xué)家們現(xiàn)在還沒有找到引起溫度變化的原因。選C。
【小題4】主旨大意題。根據(jù)主題句 ice melted equally in the north and the south 可知本文主要講的一個(gè)新的科學(xué)發(fā)現(xiàn)：冰川時(shí)期的冰川融化是在南北極均勻進(jìn)行的。選B。
考點(diǎn)：考查科普類短文
點(diǎn)評(píng)：本文考查細(xì)節(jié)題為主，細(xì)節(jié)題可以在文章中直接找到與答案有關(guān)的信息?或是其變體。搜查信息在閱讀中非常重要它包括理解作者在敘述某事時(shí)使用的具體事實(shí)、數(shù)據(jù)、圖表等細(xì)節(jié)信息。在一篇短文里大部分篇幅都屬于這類圍繞主體展開的細(xì)節(jié)。做這類題一般采用尋讀法?即先讀題，然后帶著問題快速閱讀短文，找出與問題有關(guān)的詞語(yǔ)或句子，再對(duì)相關(guān)部分進(jìn)行分析對(duì)比，找出答案。