It is reported that about two hundred people died in the accident, ______ children.
A. many of whom
B. many of them are
C. many of which
D. many of them
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加涅将学习分为智慧技能等五种类型的依据是( )
A. 不同的学习结果
B. 学习层次的高低
C. 学习情境的繁简
D. 学习水平的优劣
与新教师相比,专家型教师的课时计划更简洁、灵活、以学生为中心并有( )
______ at in this way, the air pollution in this region doesn"t seem so serious.
A. Having looked
B. Looked
C. Looking
D. To look