PS:a做某工需要15小时,b做需要18小时,现在有a单独做6小时,然后a simultaneously,but independently with b又做了3小时,问有b去complete the work 还需多少时间,答案为4小时12分钟(即有b单独完成余下的工作)
需要强调的是余数的题果然考的比较高频,没看的tx还是赶紧学会方法
作文the most experienced candidate is usually the best candidate in the leadership 。。。
The Lago Piano Company 经历了decline in sales.而这个公司通常是卖carefully handcrafted和expensive的piano.The company recently sold the inexpensive piano ang got an increase in sales.所以 The director of the company 认为公司想要扭亏为盈且surpass the 竞争者必须sell a different piano with a variety of price ranges.