(1)不充分,因为若s,r为整数时,则根据s-r=5可推知有4个正整数n满足r<n<s,若s,r为小数时,则有5个正整数n满足r<n<s;仅仅知道r和s不是整数也不能充分地回答上述问题;(1)+(2)充分,因为根据此条件可以得到有且仅有5个正整数满足r<n<s
(1)32,33,34,35,36均可以写成两个大于1的整数的乘积 sufficient
同问,list of animals为什么不用三单exhibits。如果是说 animals,animals不应该 exhibits啊。
@ soochowsky
错选B,注意since后面的releasing的主语是their descendants了,排除
D和E的差别, 体会in order to collect 和to collect的修饰成分;
枚举推理,样本代表性问题,找枚举对象两者之间的差异:
这道题我错误地选了B.
BCD是fragment, hydrocarbons and nitrogen oxides react with sunlight是一个完整的句子,描述ozone形成的时间。
请问一下estimate at什么情况下是正确的呢?
A的言外之意是,以前的pension是低于老人的正常消费水平的,因此住在urban的孩子们要定期给老人寄生活费。
there's no reason to suppose that they'll order any additional food (certainly, they'll order less additional food than a completely new set of people would!), so the consideration raised in choice (c) means that the tall tables are less likely to bring in the additional revenue that they're meant to bring in.
类比推理
作者不是站在一个客观的角度去评价主人公,而是站在support的角度,立场是很鲜明的。所以conclude 两人的观点是不对的。
Conventional theories:dense toward the center 与C答案相违背
A And its trunk originally evolving 独立主格S+doing,前面没有可以平行的,前面是主句
题干身不是隐含说R的平均寿命大于T的平均寿命;
为什么D不行呢?M在大部分县里运营赌场,说明A已经没机会了呀。。
E为啥不对呢