1、sat 数学题

1、if 18倍根号下18=r倍根号下t，where r and t are positive integers and r > t, which of following could be the value of rt? 答案为什么是108啊 完全没有思路啊

2、if the five cards 1 2 3 4 5 shown above are placed in a row so that number3 is never at either end, how many different arrangements are possible?答案是72 我混淆了 排列组合一直很差怎么办啊 到底怎么排列啊！

求详细解释。。满意答案会悬赏。。万分感谢！！

2、2018年12月 sat 答案 订购！ 保证分数！！

阅读 语法 数学 都有 每个section都会有题目作为提示

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two five seven zero five seven two two two nine

3、速求Sat改错题目的答案

1.America’s first roller coaster ride, which opened in 1884 at Coney Island, Brooklyn, and capable of a top speed of only six miles per hour. No error

2.Over the past two years, apparel manufacturers have worked to meeting the revised federal standards for the design of uniforms. No error

3.Storing bread in the refrigerator delays drying and the growth of mold but increase the rate at which the bread l oses flavor .

4.According to last week’s survey, most voters were disappointed by legislators’ inability working together on key issues

5.When Marie Curie shared the 1903 Nobel Prize for Physics with two other

scientists — her husband Pierre Curie and Henri Becquerel — she had been the first woman to win the prize.

6.Every spring in rural Vermont the sound of sap dripping into galvanized metal buckets signal the beginning of the traditional season for gathering maple syrup.

7.Those investors who sold stocks just before the stock market crashed in 1929 were either wise or exceptional lucky

8.

Most of the hypotheses that Kepler developed to explain physical forces were later rejected as inconsistent to Newtonian theory.

9.The Empire State Building, the Sears Tower, the Canadian National Tower — each of these structures was the tallest in the world at the time they were built.

10.The cost of safely disposing of the toxic chemicals is approximately

five times what the company paid to purchase it.

4、Sat数学 第18题？

Sat数学

第18题？

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