新SAT考试!精选习题+重点单词+答案解析(2016/9/26-Language & Wri

    9月新SAT 考试每日一练题目
    2016/9/26-Language & Writing)

    今天给大家分享的练习题目是:

    Some plant pathologists have turned to genetic engineering to devise new ways of responding to botanical diseases. Plant pathologist William Powell, for instance, teamed up with forest biologist Chuck Maynard to restore North America's population of American chestnut trees, which was decimated in the early 1900s by a fungus known as chestnut blight. A fungus, C. parasitica, contributes to the growth of cankers on the trees' trunks. These cankers, in turn, preventing trees from transporting water from their roots to their branches and leaves. To render American chestnut trees resistant to the blight, Powell and Maynard experimented with the genetic makeup of the trees. The resultant genetically engineered trees are called Darling 4 American chestnut trees, and during the first 15 weeks after infection with chestnut blight, they grow cankers that are much smaller than those that grow on American chestnut trees.

    A.No change
    B.trunks; these cankers, in turn, preventing
    C.trunks; these cankers, in turn, prevent
    D.trunks, these cankers, in turn, prevent


    重点单词讲解:
    render ['rendə] vt. 使成为,提供,报答,着色; 执行,实施
    related [ri'leitid] adj. 相关的,有亲属关系的
    restore [ri'stɔ:] vt. 恢复,修复,使复原
    resistant [ri'zistənt] adj. 抵抗的,反抗的
    fungus ['fʌŋgəs] n. 真菌,霉菌 (复数为funguses或fungi)
    independent [indi'pendənt] adj. 独立的,自主的,有主见的
    genetically [dʒe'netikəli] adv. 遗传(基因)方面
    infection [in'fekʃən] n. 传染,影响,传染病
    effectively [i'fektivli] adv. 事实上,有效地
    prevent [pri'vent] v. 预防,防止


    答案及解析:
    [hide]答案:C
    解析:Choice C is the best answer because it effectively uses a semicolon to join two closely related independent clauses.[/hide]




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