单项选择题

蛙泳蹬腿的正确节奏是收腿慢，蹬腿快。（） A. 对 B. 错

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【判断题】创意就是具有创造性和商业价值的想法和概念。
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单项选择题

Which one of the activities in the Qingming Festival caters to its category of agricultural festival?
A、The farmers begin to cultivate their land.
B、The farmers begin to harvest the crops.
C、People go out to enjoy the beautiful spring.
D、People go to the tomb to worship their ancestors.