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最佳答案：The teaching quality of Guangdong University of Foreign Studies is as good as th
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最佳答案：Hello. My name is XXX., this year 15 years old. I come from Guangdong Zhongshan.
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最佳答案：Room 505,Building 134,NO 135,Sun Yat-Sen University,Xingang West Road,Guangzhou,
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最佳答案：解题思路：（1）由表可知，优秀等级的学生人数为：x+y=2000-（370+377+380+373），每个个体被抽到的概率为[60/2000]，用x+y的值乘以