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  3. Throughout the nation’s more than 15,000 school districts, widely differing approaches to teaching science and math have emerg

Throughout the nation’s more than 15,000 school districts, widely differing approaches to teaching science and math have emerg

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问题     Throughout the nation’s more than 15,000 school districts,
widely differing approaches to teaching science and math have
emerged. Though there can be strength in diversity, a new
international analysis suggests that this variability has instead
contributed to lackluster achievement scores of U. S. children
related to their peers in other developed countries.【S1】______
    Indeed, concludes William H. Schmidt of Michigan State
University, who led the new analysis, " no single intellectual【S2】______
coherent vision dominates U. S. educational practice in math or
science. " The reason, he said, "is because the system is deeply
and fundamentally flawed. "
    The new analysis, which released this week by the National【S3】______
Science Foundation in Arlington, Va. , is based on data collecting【S4】______
from about 50 nations as part of the Third International Mathematics
and Science Study.
    Not only approaches to teaching science and math vary among【S5】______
individual U. S. communities, the report finds, but there appears to
be a little strategic focus within a school district’s curricula, its【S6】______
textbooks, or its teachers’ activities. This contrasts sharply with the
coordinated national programs of most other countries.
    In average, U.S. students study more topics within science【S7】______
and math than their international counterparts do. This creates an
educational environment where " is a mile wide and an inch deep,"【S8】______
Schmidt notes.
    For instance, eighth graders in the United States cover about
33 topics in math versus just 19 in Japan. Among science courses,
the international gap is even wide. U. S. curricula for this age level【S9】______
resemble those of a small group of countries including Australia,
Thailand, Iceland, and Bulgaria. Schmidt asks whether the United
States wants to be classed with these nations, whose educational
systems "share our pattern of splintered visions" and which are not【S10】______
economic leaders.
【S3】
选项
答案which—去掉which或which∧一was
解析 关系代词误用。此处意为“国家科学基金会本周发布的新的研究分析是基于……”，研究分析和发布之间是动宾关系，应使用被动语态。如果去掉which，则releasedthis week是过去分词作后置定语；若改为which was released，原句则成了which引导的非限制性定语从句，从句是被动语态。
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