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问题 单项选择题

一菱形土地的面积为√3的平方公里，菱形的最小角为60度。如果要将这一菱形土地向外扩张变成一正方形土地，问正方形土地边长最小为多少公里?

A.√2 

B.√3 

C.√6 

D.2√6

答案

参考答案：B

解析：

考点:计算问题

完形填空

先通读下面的短文，然后根据短文内容和所给首字母，在空格内填入一个适当的词，使短文意思完整。所填单词必须在答题卷标有题号的横线上完整写出。 (本大题共5分，每格0.5分)

Success comes from good habits. The most important reason that helps you succeed is what you do every day. Your habits are so important that they will decide whether you are successful or not. If you have strong and healthy habits, it does not matter whether or not you f_________ 小题1:today because you are sure to succeed in the long run. Having positive habits does not mean that you will succeed every time. However, in the long term, there is no d_________ 小题2:that you will achieve your goals and be successful f_________小题3:

A positive action will not change your life, but the same action r_________ 小题4:one thousand times will have an important effect on your life. For example, if you listen to English only one time, you will not see a big d___________小题5:in your English study. However, if you listen to English one thousand times o________小题6:five years’ time, you’ll find you’ve made progress in English. The same applies to适用于health, relationships, work and school.

Everybody can change. A_________小题7:it takes is courage and persistence毅力.

Decide right now to improve your life by c__________ 小题8:your habits. Take actions right now! Don’t be afraid. You will probably make mistakes a__________ 小题9:the way, but never forget that success is there for you if you have good habits in your life. And if you r__________ 小题10:to give up, success will be yours.
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多项选择题

阳极氧化化膜疏松的原因是（）。

A、电流大

B、温度高

C、阳极化时间短

D、湿度大
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