Students should be able to make a selection from a range of reference materials and focus their attention on one of them.
学生要能从多种参考资料中作出选择,把注意力集中在其中一种上。
Students should be able to make a selection from a range of reference materials and focus their attention on one of them.
学生要能从多种参考资料中作出选择,把注意力集中在其中一种上。
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