江濤英語：2008年6月英語四六級快速閱讀預測

　　答案解析

　　1. Y。題干講到了微軟的PowerPoint對學術及商業(yè)陳述形式的改變，定位到文章的首段可知題干表述與原文相符。

　　2. N。根據題干中的信息詞wording of the text定位到第一個小標題下的第一段，可知題干表述與原文相反。

　　3. Y。根據題干中的信息詞the font styles for the title and the text定位到第一個小標題下的第四段第一句話，可知題干表述與原文相符。

　　4. N。根據題干中的信息詞more formal situation和capitalizing定位到第一個小標題下的第七段第一句話，可知更加正式的方式是僅大寫第一個單詞的首字母，故題干表述錯誤。

　　5. N。根據題干中的信息詞Centering bulleted lists or text定位到第一個小標題下的第九段，可知題干表述與原文相反。

　　6. Y。根據題干中的信息詞Sound effects定位到第二個小標題下的第三段，可知題干表述與原文相符。

　　7. NG。根據題干中的信息詞importing和two megabytes定位到第三個小標題下的第三段，可知原文提到的是插入的圖片要少于兩兆字節(jié)，而并未提及插入的flash大小。

　　8. as possible as you can。根據題干中的信息詞look at the audience定位到第四個小標題下的第四段可得答案。

　　9. erase everything you’ve drawn。根據題干中的信息詞Pressing the E key定位到第四個小標題下的第七段第三句話可得答案。

　　10. meet your presentation needs。根據題干中的信息詞make changes at the “slide master” level定位到文章的最后一段可得答案。

　　Passage 3

　　Natural Disasters

　　Earthquakes

　　When the Earth Moves

　　Earthquakes are caused by the motion of tectonic plates—individual sections that make up the Earth’s surface like panels on a football. Immense strain accumulates along fault lines where adjacent plates meet. When the rock separating the plates gives way, sudden seismic ground-shaking movement occurs.

　　Of course, if we want to know why earthquakes happen, we need to dig a little deeper.

　　Centre of the Earth

　　The Earth is made up of three main layers:

　　The core is at the centre of the Earth.

　　The mantle is a mobile semi-molten layer around the core.

　　The outer-shell of the Earth is called the crust. Scientists call this the lithosphere—it’s the part we’re on now.

　　The crust is made up of 12 individual tectonic plates. Below the sea, they can measure three to six miles (4km-9.6km) thick and under land this increases to 20-44 miles (32km-70.8km). Below the crust, radiation from the Earth’s core heats the semi-molten mantle to temperatures of over 5000°C.

　　All fluids when heated—even molten rock—are affected by a process called convection. That makes hot liquid rise to displace cooler liquid, creating a current. Tectonic plates effectively float on the mantle, like croutons in a bowl of super-heated soup. But these plates and constantly move due to the convection current.

　　Of course, they creep along very slowly—roughly the same speed your fingernails grow. Even at this sub snail-pace, the effects can be devastating. The combined annual force of earthquakes is equal to 100,000 times the power of the atomic bombs that flattened Hiroshima.

　　The point where the seismic activity occurs is the epicentre, where the earthquake is strongest. But it doesn’t always end there; seismic waves travel out from the epicentre, sometimes creating widespread destruction as they pass.

　　Volcanoes

　　Without doubt, erupting volcanoes are the most awesome and terrifying sights in nature. In fact, their untamed destructive firepower has shaped and influenced many ancient cultures from Pompeii, to Japan.

　　It’s estimated that one in ten of the World’s population live within “danger range” of volcanoes. According to the Smithsonian Institute, there are 1511 “active” volcanoes across the globe, and many more dormant ones that could recharge at any moment.

　　When tectonic plates collide，like earthquakes, volcanoes form at weak-points in the Earth’s crust, known as “fault-lines”.

　　When two tectonic plates collide, the event can provide the catalyst for volcanic activity. As one section slides on top of the other, the one beneath is pushed down into the mantle. Water trapped in the crust can cause reactions within the mantle. Why? Well, it’s thought that when the water mixes with the mantle, it lowers the mantle’s melting point, and the solid mantle melts to form a liquid, known as ‘magma’.

　　相關鏈接：江濤英語：2008年6月英語四級寫作預測

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