AAn introduction of a Toyotas 225 horsepower V6 engine.
BA description of the nanomotor in terms of power and size.
CSurface tension(表面张力).
DPrevious inventions of nanoscale(纳米级的) products.
EThe working principle of the nanomotor.
FPossible fields of application in the future.
指定的四个段落都没有明显的段落主题句(2007年理工类A/B级概括大意题中四个指定段落都没有明显段落主题句),考生可以通过通读指定段落的大意来归纳出段落主题,或借助一些有效的答题技巧确认段落主题。以确认段落第4段的段落主题为例分析答题技巧:
AAn introduction of a Toyotas 225 horsepower V6 engine.
BA description of the nanomotor in terms of power and size.
CSurface tension(表面张力).
DPrevious inventions of nanoscale(纳米级的) products.
EThe working principle of the nanomotor.
FPossible fields of application in the future.
2.Paragraph 4 ____.
4. Although the amount of energy produced is small -- 20 microwatts -- it is quite impressive in relation to(与...相比 )the tiny scale of the motor. The whole setup is less than 200 nanometers on a side, or hundreds of times smaller than the width of a human hair. If it could be scaled up to the size of an automobile engine, it would be 100 million times more powerful(强大的) than a Toyota Camrys 225 horsepower(马力) V6 engine.
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