Nowadays it is more convenient and easier for people to travel to other countries. Do you think the positive effects exceed the negative effects?
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Advertising discourages people from being different individuals by making us all want to do the same and look the same. Do you agree or disagree?
某板坯连铸机拉坯速度为2.0m/min,出结晶器的安全坯壳厚度为12mm,结晶器冷凝系数为20mm/min,求该铸机的结晶器长度
通过记录大脑皮层的脑电活动的变化,发现在4-20岁之间,大脑有两个显着加速期。第一次发生在_______岁之间,第二次发生在_______之间
We have three important parts of education reading, writing and mathematics. Some people think every child will benefit from the fourth skill added to the list: computer skills. Do you agree or disagr