试题与答案

发电机与电网同步的条件,主要是指()A、相序一致,相位相同,频率相同,电压大小相等

题型:单项选择题

题目:

发电机与电网同步的条件,主要是指()

A、相序一致,相位相同,频率相同,电压大小相等

B、频率相同

C、电压幅值相同

D、相位、频率、电压相同

答案:

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参考答案:C解析: 本题考查企业信息化规划的基础知识。企业战略数据模型可分为数据库模型和数据仓库模型,数据库模型用来描述日常事务处理中的数据及其关系;数据仓库模型则描述企业高层管理决策者所需信息及其...

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题型:阅读理解

Yoga(瑜伽)is an ancient practice that helps create a sense of union in body, mind, and spirit. It brings us balance. After a long time of practice yoga, you no longer just practice it — you love it.

Yoga becomes part of your physical life. Your body grows stronger, more toned(有弹性的), and more flexible as you move from one pose to another. I spent a week in Mexico at a yoga retreat, and it was the first vacation on which I lost weight. “Rather than building muscles, yoga builds muscle tone,” says Shakta Kaur Khalsa, author of KISS Guide to Yoga. “Because yoga helps maintain a balanced metabolism(新陈代谢), and it also helps to control weight. Additionally, yoga stretches muscles lengthwise, causing fat around the cells disappear, thus losing weight.”

I do yoga poses throughout the day. After hours at my computer, I stretch my stiff shoulders and arms. When I need an increase in energy, I do energizing poses. When I am feeling exhausted at the end of the day, I do restorative(恢复体力的)poses.

Yoga becomes part of your mental life. Yoga teaches you to focus on breathing while you hold the poses. This attention to breath is calming; it dissolves(使消除)stress and anxiety. I use yogic breathing on the tennis court, in the dentist’s chair, and when I’m stuck in traffic.

You should always leave a yoga practice feeling energized, but not tired. If you feel tired after yoga, it means you spent the time “fighting” yourself, trying to force yourself into poses. In yoga, you “surrender” to the poses by letting go of the tension.

64. What will be talked about if this passage continues?

A. Yoga is becoming part of your spiritual life.

B. Yoga is becoming popular all over the world.

C. The disadvantages of yoga.

D. Encouraging people to do yoga.

65. According to the second paragraph, yoga can help people ___.

A. grow tall             B. lose weight C. be flexible in thinking     D. make friends

66. Why does a person feel tired after yoga?

A. Because when practicing yoga, people will consume a lot of energy.

B. Because he or she surrenders to the poses by letting go of the tension.

C. Because yoga doesn’t benefit all the people.

D. Because he or she doesn’t do yoga poses naturally.

67. What would be the best title for this passage?

A. What’s yoga?                                         B. How do I do yoga poses?

C. The benefits of yoga.                           C. The varieties of yoga.

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题型:问答题 案例分析题

材料一:1524年,有位西班牙人这样说:“以前我们在世界的边缘,现在在它的中央了,这给我们的命运带来了前所未有的改变。”

——〈西方文明史〉

材料二:哥伦布没有到达印度,但他发现了至关重要的贵金属。据经济史权威估计,从1493年到1800年世界白银产量的85%和黄金产量的70%来自拉丁美洲。美洲白银生产在16世纪约为17000吨,到7世纪约为42000吨,其中由31000吨运抵欧洲。欧洲又将40%运往亚洲。……美洲白银18世纪产量约为74000吨,其中52000吨运往欧洲,其中40%约20000吨运往亚洲。另外留在美洲本土的白银约有3000吨横渡太平洋经马尼拉运抵中国。如果再加上日本和其他地方生产的白银,全球白银产量的一半最终抵达亚洲,尤其是中国和印度。

——弗兰克《白银资本》序

材料三:哥伦布发现美洲以及接踵来的葡萄牙人、英国人、法国人等,通过对新土地的殖民和占有,与土著居民的接触、交往和融合给欧洲人送去了新世界的文明,还使新旧大陆的物产得以交换和传播……

东西两半球的不同文化圈的大汇合,加速了人类从传统农耕文明向现代工业文明转变的过程。……没有美洲贡献的大量金银与物质财富,没有北美的自由移民垦殖区,西方资本主义的发展将会缓慢得多,英国也不可能成为发动工业革命的国家……没有把世界连成整体的世界大革命,也不可能推动否定传统的思想解放运动。

——黄邦和《通向现代世界的500年:哥伦布以来东西两半球汇合的世界影响》

材料一所说的“以前我们在世界的边缘,现在在它的中央了”的含义是什么?

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