题干

火灾常给森林带来较大危害,但是在某些国家有时对寒带地区森林中的残枝落叶等进行有限度的人工火烧,以对森林进行资源管理,这种人工火烧的主要目的是

A:消灭森林病虫害

B:刺激树木种子萌发

C:加速生态系统的分解过程

D:提高森林的蓄水能力

上一题 下一题 0.0难度 选择题 更新时间:2014-06-03 06:52:51

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C

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任务型阅读

    Before you begin studying English, ask yourself one question: “____” Is it because you want to, or because someone else wants you to? Like every decision in life, studying English must be something you want to do. Here are some tips to help you learn English well.

    Set goals.

    If you know why you want to study, setting goals is easy. For example, maybe you want to travel to an English-speaking country. Great! ____ Perhaps you have already known many useful phrases, but you want to improve your listening skills and pronunciation. Whatever your goals are, you should write them down,

    ____

    How long do you need to study to achieve your goals? This answer is different for every student. ____ If you work 40 hours per week,don't plan on spending another.____ hours a week studying English. Start off slow, but study regularly. Use material that is challenging, but not too difficult. Find out what works for you. After you have studied for a few weeks, adjust your study schedule accordingly.

    Make a commitment.

    Learning English requires a lot of motivation. Nobody is going to take your attendance when you aren't in class. If you are sure that you are ready to begin studying, make a commitment.

    Have fun learning English.

    If you aren't having fun learning English, you're not studying the right way! You can be a serious student who has fun at the same time. Make up your own reward program to give yourself encouragement to stay on a task.

A. Make an arrangement.

B. Why do I want to study English?

C. Your goal might be to learn “Survival English”.

D. The important thing is to be realistic and reliable.

E. What is the most effective way of learning English?

F. The things we do best in life are what we enjoy doing.

G. Make every moment of your English learning meaningful.