RON:the principal objection here is that the meaning is incorrect/unclear: for instance, a 'two-year low level' could mean that it hit a low level and then stayed there for two years.
consider other uses of the adjective "two-year":
a two-year lease is a lease that LASTS for two years.
a two-year recession is a recession that LASTS for two years.
a two-year marriage ... etc. etc.
m不是p的一个因数,那么p/m的余数一定大于等于1. 题目问是否大于,只要不等于1,那肯定就是大于1的。
1)最大公约数是2,说明m ,p都可以被2 整除,m,p都是偶数,p/m 的余数不可能等于1,因为 被除数p=除数m乘以商再加上余数,m是偶数,m乘以商也是偶数,如果余数是1的话,加上1,得出的被除数p就是奇数了,矛盾。所以余数不是1. (1)充分
2)最小公倍数30=3*2*5,m,p的可能取值有:3,10;2,15;5,6,其中3,10的余数=1,不充分 回
做这些题型的时候,不是看给出的条件,对于判断有没有帮助吗?如果条件2)所有可能(这里是假设的情况,假设,假设),条件2的各种情况都指向 r=1,即可以得出 r is not more than 1. 是不是也是正确的答案?