( Based on the growth rates of large modern reptiles such as ) the Galapagos tortoise and examination of fossils of juvenile dinosaurs, scientists estimate that the larger dinosaurs probably lived to be between 100 and 200 years old. A. Based on the growth rates of large modern reptiles such as B. On the basis of growth rates of large modern reptiles such as C. Based on the growth rates of large modern reptiles like D. On the basis of growth rates of large modern reptiles, like those of E. Based on the growth rates as those of large modern reptiles like 答案是B，错选了A。科学家基于爬行动物的生长率，估计了恐龙的存活时间。科学家做based on的逻辑主语有错吗？麻烦老师讲解。 (Based on account of various ancient writers) , scholars have painted a sketchy picture of the activities of an all-female cult that, perhaps as early as the sixth century B.C, worshipped a godness known in Latin as Bona Dea "the good goddess". A. Based on account of various ancient writers B. Basing it on various ancient writer's accounts C. With accounts of various ancient writers used for a basis D. By the accounts of various ancient writers they used E. Using accounts of various ancient writers 答案是E，还是错选了A。做题时在AE纠结了好久，因为不确定学者作为“基于不同作家的解释”的主语是不是错的，而且感觉基于要比使用的表达更好，尽管可以确定using的主语是学者，但还是把E排除了，麻烦老师讲解。 因为不知道这两道题是犯了什么错误，所以去有道查了based on 的例句，发现人是可以做主语的：Based on the finding, one might predict that the bank should increase its display and budget. 以及 Based on that representation, the district judge denied a motion to dismiss the new comlaint. 麻烦老师讲解这几个题的区别。

The profit from the sale of a certain appliance increases, though not proportionally, with the number of units sold. Did the profit exceed $4 million on sales of 380,000 units? (1)The profit exceeded $2 million on sales of 200,000 units. (2)The profit exceeded $5 million on sales of 350,000 units. 1不够，2 怎么看？ 谢谢

A report consisting of 2,600 words is divided into 23 paragraphs. A 2-paragraph preface is then added to the report. Is the average (arithmetic mean) number of words per paragraph for all 25 paragraphs less than 120 ? (1) Each paragraph of the preface has more than 100 words. (2) Each paragraph of the preface has fewer than 150 words.

PS ：给树标号，范围是201到740 某一品种的树的百位一定是4、5、6、7，个位一定是2、3、4、5， 求随便抽一棵树不是这个特定品种的树的概率？

DS：is|x-y|>|x-z|？ 条件1：是y的绝对值大于z的绝对值 。 条件2：是x<0。

1 3 2 B 3 4 4 10 A 2 8 1 第一列是调查的信用卡的拥有数，第二列是对应的人数，如第一行的意思就是三个人每人拥有一张信用卡，问信用卡拥有数的中位数？ （1）A=6 （2）B=7

m*(m+5)*(m+6)的因数可能是哪几个？ 3 ， 4 ， 6

连续四天股票收盘分别停在了8230，8390，8460，8530（数字可能有出入），第五天收盘多少？ （1）这组数的差值是220 （2）8390是这组数的中位数

三角形ABC，点D在AC上，D不能与AC相交（解释说这句话的意思是BD不能等于BA和BC，是独立的），AB是否等于BC？ （1）角BDC=角BCD （2）BD=DC

有A和B，共n个人（人数已知）他们每个人都可以同意或不同意一件事情，已知A有X人，B有Y人，bothA和B有Z人，求又是B又不同意的人？

给了两种书数量的比例3：X，求X？ （1）数的总数是15 （2）X小于13 讨论说选A，因为比例不能是3:12，必须要是最简形式1：4，可是我觉得3:12可以，3:2也可以，条件1不充分