题目

某市500名10岁正常男孩中,有95%的人体重在18~30kg范围内,由此可知此
500名男孩体重的标准差等于:
A、2kgB、2.326kgC、6.122kgD、3.061kgE、6kg

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College is a place to explore many possibilities; you really can’t do it all-unless you manage your time wisely. Here are some tips I have found very helpful for managing my time and maximizing(使…最大化) my study efforts:
  1. Determine your goals. What do you want to get out of a college education? Academic(学术的) knowledge? Leadership experience within a club? Decide what is most important to you. Then devote proportionate(成比例的) amounts of time to those efforts.
  2. Plan ahead. You may think you can keep everything in your head, but as the activities on your schedule start piling up, making a schedule can really help organize even little tasks.
3.Study at strategic (关键的) times. Don’t wait until you’re falling asleep to study. Study first. Save those e-mails to check later, because tasks that don’t require much energy and attention can still be done when you’re tired.
4.Motivate (激励) yourself! You know that TV show you’ve been dying to see, or that game of chess you’ve been waiting all week to challenge your friend to. These and many other special activities can be used for motivation. Promise yourself that you’ll force yourself to work efficiently. (Don’t rush through the assignment, though.)
  5. Take a nap. Sometimes even a 20-minute nap in the afternoon will give you the extra energy you need to get through the day.
1. We need to play ahead in order to ________.

A. keep a record of all the events B. better organize our activities
C. store everything in our head D. pile up little tasks neatly
2. Strategic times are best for us to ________.

A. save energy B. check e-mails
C. study efficiently D. organize activities
3. Which of the following could be used as a motivation to do our assignments?

A. Remembering our urgent tasks. B. Any activities we’re eager to do.
C. Taking a break in the afternoon. D. The promise to study efficiently.
4. What can help us to keep refreshed throughout the day?

A. Doing some physical exercise. B. Taking a short nap in the afternoon.
C. Rushing through some assignments. D. Playing a game of chess with a friend.
5. Which of the following could be the best title for this article?

A. Study Habits and Time Management
B. Business Management and Leadership
C. University Education and Campus Life
D. Life Goals and Academic Development
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