Biological diversity, or biodiversity, means the variety of life on earth and includes the
______ the direction of the experienced experts, they successfully carried out the experiment. |
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A. With B. By C. In D. Under |
Never has there been a language quite like English. A bold statement, yet nevertheless true. Consider a few statistics. Today, one out of every seven people in the world use English in some way. More than half the world's books are written in English; the majority of international telephone calls are made in English; 60% of the world's radio programs are broadcast in English. English is even the working language of international air travel. For the first time in history, a single language has become dominant across a wide range of human activity, ranging from music, film and fine arts to the fields of business, diplomacy, science and technology.
1.你认为在研究生学习阶段是选择一个好的学校重要还是选择一个好的专业重要?
2.你的理由是什么?
On some occasions it is important to adhere to the conventions that characterize serious public discourse and to avoid expressions that we might use in more casual situations. Among the features of formal English are the careful explanation of background information, complexity in sentence structure, explicit transitions between thoughts, and the use of certain words that are reserved chiefly for creating a formal tone. Situations that normally require formal usage would include an article discussing a serious matter submitted to a respected journal, an official report by a group of researchers to a government body, a talk presented to a professional organization, and a letter of job application.
Quitting smoking is more of a matter of willpower than of individual choice, for smoking is widely recognized as addictive. Although counseling and medication can increase the odds that a smoker quits permanently, the best way to avoid dilemmas is never to take up smoking to begin with. The irreversible effects of cigarette smoking vary in intensity and are related both to the amount and duration of exposure and the age at which the person is initially exposed. This report challenges the notion that a few years of exposure to smoking will have no lasting harmful consequences.
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