题目内容

In which Canadian province did Jump Math participate in a large randomized controlled trial?

A. Ontario
B. Alberta
C. British Columbia
D. Nova Scotia

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Psychologist Carol Dweck observed the author teach a Grade 6 class a problem-solving lesson on ______.

A. circumference
B. volume
C. area
D. perimeter

简述儿童语义的发展特点。

简述儿童语法的发展特点。

简述儿童语用的发展特点。