答案解析
1. Y。题干讲到了微软的PowerPoint对学术及商业陈述形式的改变，定位到文章的首段可知题干表述与原文相符。
2. N。根据题干中的信息词wording of the text定位到第一个小标题下的第一段，可知题干表述与原文相反。
3. Y。根据题干中的信息词the font styles for the title and the text定位到第一个小标题下的第四段第一句话，可知题干表述与原文相符。
4. N。根据题干中的信息词more formal situation和capitalizing定位到第一个小标题下的第七段第一句话，可知更加正式的方式是仅大写第一个单词的首字母，故题干表述错误。
5. N。根据题干中的信息词Centering bulleted lists or text定位到第一个小标题下的第九段，可知题干表述与原文相反。
6. Y。根据题干中的信息词Sound effects定位到第二个小标题下的第三段，可知题干表述与原文相符。
7. NG。根据题干中的信息词importing和two megabytes定位到第三个小标题下的第三段，可知原文提到的是插入的图片要少于两兆字节，而并未提及插入的flash大小。
8. as possible as you can。根据题干中的信息词look at the audience定位到第四个小标题下的第四段可得答案。
9. erase everything you’ve drawn。根据题干中的信息词Pressing the E key定位到第四个小标题下的第七段第三句话可得答案。
10. meet your presentation needs。根据题干中的信息词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’.
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