us how both profit-makers and policy-makers must use a wide-angle lens to truly understand the past and predict the future.

1. According to the passage, the book Simply Electrifying is written to tell us .

　A. pioneering science of electricity

　B. significant journeys of electricity

　C. the people who invented electricity

　D. the research which was about electricity

2. Why is President Barack Obama mentioned in the book Simply Electrifying?

　A. Because a policy-maker is usually a top dog that can arouse the readers' interest.

　B. Because a policy-maker can help promote the better use of electricity.

　C. Because policy-makers can decide the future of the use of electricity on the market.

　D. Because policy-makers can take control of the economy through electricity.

　　B

　　There is an ancient Chinese story about a giant man named Kua Fu who chases the sun. He drains the Yellow and Wei rivers during his race and finally dies of dehydration(脱水). His failure has reminded people of the unstoppable power of the sun for centuries.

The probe itself is almost as big as a car and needed the help of a powerful rocket to escape Earth's orbit, change direction and reach the sun, reported CNN.

　　In order to reach the sun, the probe must complete seven flybys(近天体探测器) of Venus, using the power of the planet's gravity to change its path, sending it toward the sun.

But that's not the only difficult part of the journey. As the probe approaches the