问答题

1 Questions 1 and 2 will be based on the following news item.
A、Children's first words.
B、Eager parents.
C、Music for parents.
D、Toddler speech development.

答案： Toddler speech development.

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单项选择题

A、
B、
C、该方程组无解
D、该方程组有无穷多解