1.Mary prefers apples oranges 2.Walking and cycling in Guilin is great fun 3.She wa...
1.Mary prefers apples oranges 2.Walking and cycling in Guilin is great fun 3.She was not tall enough to reach the books on the shelf 4.Shenzhen is loceted in the south of China 5.He spent 300 yuan on his new dress
已知旗杆的高为10米,在同一时刻测得旗杆的影子AB=7.2米,大树的影子CD=5.4米,求大树的高(1/3)跪求答案啊 某电脑城销售一批移动硬盘,平均每天可售出20块,每块盈利40元,为了扩大销售,增加利润,商家决定降价(2/3)销售,经调查发现：如果每块移动硬盘降价5元,平均每天可多售出10块,若商场销售这种移动硬盘要求平均每天盈利达到1200元,那么每块硬盘