7.31 换库第二天，寂静放狗

De-lovely

感谢分享！               

强悍小妮

bzy! 发表于 2018-7-31 20:18
Alongside Standard English there are many robust local, regional, and social dialec ...

Descriptive books try to describe the grammatical system that underlies the way people actually speak and write the language. That's what our book aims to do: we want to describe what Standard English is like.

Prescriptive books aim to tell people how they should speak and write - to give advice on how to use the language. They typically take the form ofusage manuals, though school textbook treatments of grammar also tend to be prescriptive.

In principle you could imagine descriptive and prescriptive approaches not being in conflict at all: the descriptive grammar books would explain what the language is like, and the prescriptive ones would tell you how to avoid mistakes when using it. Not making mistakes would mean using the language in a way that agreed with the descriptive account. The two kinds of book could agree on the facts. And indeed there are some very good usage books based on thorough descriptive research into how Standard English is spoken and written. But there is also a long tradition of pre­scriptive works that are deeply flawed: they simply don't represent things correctly or coherently, and some of their advice is bad advice.


这三段是那篇阅读的开头。

下面一段详细讲了那个Flaw. 举了a1, a2, b1, b2的句子。（a1, b1都是语法正错的句子， a2, b2是人们口头也会用的兔子） 这里有考题的
有几个选项： 就是上面的a1,a2,b1,b2两两组合问是gramatically correct 还是incorrect.
                    比如  a1,a2都是gramatically correct

最后还有一段总结段。

我想静静

顶楼主！               

billyisfragile!

强悍小妮 发表于 2018-7-31 20:32
Descriptive books try to describe the grammatical system that underlies the way people actually sp ...

In principle you could imagine descriptive and prescriptive approaches not being in conflict at all: the descriptive grammar books would explain what the language is like, and the prescriptive ones would tell you how to avoid mistakes when using it. Not making mistakes would mean using the language in a way that agreed with the descriptive account. The two kinds of book could agree on the facts. And indeed there are some very good usage books based on thorough descriptive research into how Standard English is spoken and written. But there is also a long tradition of pre­scriptive works that are deeply flawed: they simply don't represent things correctly or coherently, and some of their advice is bad advice.

Perhaps the most important failing of the bad usage books is that they fre­quently do not make the distinction we just made between STANDARD VS NON­STANDARD DIALECTS on the one hand and FORMAL VS INFORMAL STYLE on the other. They apply the term 'incorrect' not only to non-standard usage like the forms in [ 1 ] but also to informal constructions like the forms in [2] . But it isn't sensible to call a construction grammatically incorrect when people whose status as fully competent speakers of the standard language is unassail­able use it nearly all the time. Yet that's what (in effect) many prescriptive man­uals do.

是原文吗？ 麻烦确认一下。感激不尽。

强悍小妮

bzy! 发表于 2018-7-31 20:39
In principle you could imagine descriptive and prescriptive approaches not being in conflict at al ...

是原文。我记得一直在说什么gramtically incorrect之类的

billyisfragile!

逻辑
forest 要减少砍树。因为卡车载木材要开路，砍更多树，而直升飞机不用。建议用直升飞机运，不用卡车。问哪个选项undermine还是evaluate

https://forum.chasedream.com/thread-313771-1-1.html

[求助]关于3-26砍树CR jj 的求解？
是砍树的。说为了保护森林，一个城市要求砍树的公司不能把log从公路运出来必须用直升机运出来，因为修公路毁坏场地。哪个weaken它？
   A.直升机运也要毁坏场地

   B. 过去10年，这个城市要求修路不能毁坏场地已经取得了明显的效果

Answer:B?

我想静静

请问那道数学题怎么做呀？就至少包含3个数子集的那个

强悍小妮

我想静静 发表于 2018-7-31 21:01
请问那道数学题怎么做呀？就至少包含3个数子集的那个

我觉得可以分开算，1. 3个数的子集   2.4个数的子集  3. 5 个数的子集，4. 6个数的集合。 其实我不太会，考场没时间细想，猜了一个

强悍小妮

我想静静 发表于 2018-7-31 21:01
请问那道数学题怎么做呀？就至少包含3个数子集的那个

认真想下，明白了。

用的是组合的概念。
从n个不同的元素中取m(m≤n)个元素的所有组合的个数，叫做从n个不同元素中取出m个元素的组合数，记为Cnm。组合C(n,m)=n!/m!（n-m)!

3个数的子集：C(3.6)= 20
4个数的子集：C(4,6)= 15
5个数的子集：C(5,6)=6
6个数的子集：1
一共是42个

应该是对的吧？
我数学真的很渣。排列组合更是硬伤

我想静静

强悍小妮 发表于 2018-7-31 21:47
认真想下，明白了。

用的是组合的概念。

会了！感谢！我也是排列组合一直不好，概率论根本没有好好听课