While larger banks can afford to maintain their own data-processing operations, many smaller regional and community banks are finding that the ( cost associated with ) upgrading data-processing equipment and with the development and maintenance of new products and technical staff are prohibitive.
A. cost associated with
B. costs associated with
C. costs arising from
D. cost of
E. costs of
这道题选了A,答案是B。上次答疑英老师说cost是不可数名词,不明白为什么选B。做题时感觉应该不是根据后面的谓语are来判断,因为谓语动词前面and连接了几个并列成分。现在review时不确定这些并列成分全都是修饰cost的,还是cost的并列。麻烦老师讲解。
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提问:
GMAT数学(博智教材)第62页:If X is equal to the sum of the even integers from 40 to 60, inclusive, and y is the number of even integers from 40 to 60, inclusive, what is the value of x+y?
X=40+42+44......60=550
Y=(60-40)/2+1=11, 答案应该是561,为什么书后面的答案显示是560?
DS:5个数中 median 小于 average ;另外7个数也median 小于 average,然后这12个数没有重复的,12个数放在一个数集里面,问是不是median 小于average?
条件1:7个的average 小于 5个的average
条件2:7个的median 小于 5个的 median
题目:of the 200 students at college T majoring in one or more of the sciences, 130 are majoring in chemistry and 150 majoring in biology. If at least 30 of the students are not majoring in either chemistry or biology, then the number students majoring in both biology and chemistry could be any number from
a) 20 to 50
b) 40 to 70
c) 50 to 130
d) 110 to 130
e) 110 to 150
问题:这道题能理解到是用集合的知识点,但是无论怎么做都无法突破,得到最后结果。还请老师讲解。谢谢