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加法练习,程序会随机给出两个两位数,在规定时间内进行作答,如果回答错误,或者是时间到达,认为回答错误,累计十次计算后,给予结果-Addition to practice, procedures will be randomly given two double-digit in the specified time to answer the question, if answered wrong, or the time taken to reach that answer wrong, a total of ten times calculated, given the results of