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举一反三
【单选题】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 analysi...
A.
it lacks a coordinated national program
B.
it sets a very low academic standard for students
C.
it relies heavily on the initiative of individual teachers
D.
it attaches too much importance to intensive study of school subjects
【单选题】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 analysi...
A.
lays stress on quality at the expense of quantity
B.
offers an environment for comprehensive education
C.
encourages learning both in depth and in scope
D.
scratches the surface of a wide range of topics
【单选题】石灰窑燃烧温度太高，原因及处理方法不正确的是（）。
A.
太多的热量输入，减少热量输入
B.
过剩系数调整错误，调整过剩系数
C.
石灰结块，减少热量输入
D.
石灰石粒度小，提供合格的石灰石