D. The number of sunspots declines after coronal mass ejections.
3. According to the passage,NASA will launch a satellite to .
A. take images of the solar system
B. provide early warning of thunderstorms
C. keep track of solar activities
D. improve the communications on Earth
4. Which of the following might be the best title of the passage?
A. Solar Storms: An Invisible Killer
B. Solar Storms: Earth Environment in Danger
C. Solar Storms: Threatening the Human Race
D. Solar Storms: Human Activities to Be Troubled
【参考答案】1—4、BDCD
阅读理解【2】
阅读下列四篇短文,从每小题后所给的A,B,C或D四个选项中,选出最佳选项。
The term“multitasking” originally referred to a computer’s ability to carry out several tasks at one time. For many people, multitasking has become a way of life and even a key to success. In fact, some excellent mental aerobic exercises(大脑训练)involve engaging the brain in two or more challenging activities at a time. Although checking e-mail while talking on a phone and reading the newspaper may be second nature for some people, many times multitasking can make us less productive, rather than more. And studies show that too much multitasking can lead to increased stress, anxiety and memory loss.
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