A. 在用verilog编写三段式状态机的时候，我看网上很多地方都是提到格式如下：always @ (posedge clk or negedg
1.第二段如果用时序逻辑，会导致你的状态机对输入条件的引起的变化多延迟一拍。
2.CS比NS慢一拍，如果用CS，你的o1,o2都会晚一拍。
B. 网上购物常用的英文单词，如 “拍下”、“合并付款”英语怎么说
拍下：用英语说就是 buy them；合并付款：pay them together。另附商务英语的资料1、商务英语词汇
英语词汇多达几十万，并且词语表义较为灵活，对上下文的依赖也较大。如，"board"一词，本义为"木板"，但在不同上下文中，可以表示"车"、"船"、"伙食"、"会议桌"、"委员会"等。而在商务英语中，"board"往往用来表示"董事会"，如，"chairman or president of the board"（董事会主席或董事长）；或者，它经常用在FOB (Free on Board，离岸价，船上交货价)价格术语中，意思是"船"。
在商务英语中，有着许多通过引申、转换、添加等手段而获得的有别于普通英语词义的具有"新义"的"旧词"。例如：
literature 在普通英语中，它表示"文学"；而在商务英语中，它则表示"printed matters, including leaflets, instruction, proct catalogue, price list, etc. (文字宣传资料，诸如产品说明书、产品目录、价目表等)"。 例如：
In order to market our new proct，we have printed fine literature．(为了推销新产品，我们印了精美的宣传资料。)
claim 在普通英语中，它的意思是"要求，认领"；而在商务英语中，它则表示"demand or request for a thing considered one's e (索赔)"。 例如：
We claimed on that shipping company for the loss involved．（我们向轮船公司就有关损失提出索赔。）
reference 在普通英语中，它表示"参考，查阅，提及"；而在商务英语中，它的意思是"persons or firms named by a customer asking a supplier for credit, from whom the supplier can get information about the business reputation of the customer (担保人，证明人)"。 例如：
My reference will prove to you that I am efficient and dependable. (我的担保人将向你证明我的工作是高效的，并且我是可信赖的。)
除了属于英语共核部分(English common core)的词汇以外，商务英语还有着其特别的专门词汇。例如：
backlog: orders to supply, needing to be dealt with quickly (积欠未交货的订单)
e.g. We have a large backlog. (我们积压的订货甚多。)
in-tray: tray for incoming documents (放在办公桌上用来装收到的文件的容器，收文篮；用于盛放将要发出去的文件的容器叫out-tray, 发文篮)
e.g. When l am away，please help to check my in-tray. (我不在的时候，请帮我查看我的收文篮。)
overheads：routine administrative and maintenance expenses of a business (公司的日常开支，如电费、文具费、汽车油费等)
e.g. We have some money indeed，but we are very sorry that we cannot return the money now，as we have to consider our overheads. (我们确实有些钱，但是，非常抱歉，我们目前不能还这笔钱，因为我们得考虑我们的日常开销。)
2、商务英语短语
在商务英语背景下，通过搭配而形成了许多专用于商务英语的具有商务特征的短语。例如：
outstanding accounts：accounts that are overe for payment (到期未付的帐)
e.g. We hope the outstanding account can be settled within this month. Otherwise, our accounting department will consider changing the conditions of payment for future orders. (我们希望你方本月能将欠帐结清，否则，我方财务部将考虑改变定单支付条件。)
debit note： a note in a form similar to an invoice but used where an invoice would not be right for the purpose. The debit note relates to charges, such as freight, extra to amounts already invoiced for goods, and is also used to correct mistakes such as an amount under-charged in an invoice. (借项通知单，指卖方通知买方更正错误的文件，即：通知买方，因其错误而要借记(增加)买方应收账款账户，向对方补收钱；与之相对的是credit note（贷项通知单）。)
e.g. We shall of course refund to you the premium upon receipt of your debit note or, if you like, you may draw on us at sight for the amount required. (一收到你们的索款通知单，我们当立即把保险费付还给你们。如果你们愿意的话，也可以开即期汇票向我们收取所需金额。)
unsocial hours：time for overwork (与社交活动冲突的时间、加班的时间)
e.g. We should emphasize the large extra bonus for working in unsocial hours．(我们应当重视对额外加班发高额奖金。)
flexitime system：system of flexible working hours (弹性工作制度：一种根据工作特点灵活确定上下班时间的工作制度。例如，某人每天工作的八个小时内，只有从上午十点钟到下午三点钟是一天中最忙的时间，那么，经商定他可以不在正常的上午八点钟上班，在晚些时候到公司上班；下午也不一定在规定的五点钟下班，可以提前下班。他集中精力的工作时间(如10：00～15：00)叫做core time，灵活的工作时间叫做flexiband)
e.g. The first item on the agenda is a discussion of the management's proposals on flexitime system．(会议安排表的第一项是讨论资方提出的弹性工作制。)
living out of a suitcase: often go on business trips (经常出差在外)
e.g. My husband is a sales-manager．He is a man living out of a suitcase．(我丈夫是销售经理，老是出差在外。)
make five clerks rendant：dismiss five clerks (裁员五名)
e.g. Our branch is badly overstaffed．We have now decided to make eight clerks rendant．(我们分公司严重超员，我们已经决定裁员八名。)
希望能够学到更多相关知识。
C. 随着网络的发展，网上购物越来越受到人们的喜爱，网上购物的人也越来越多，请你谈谈网上购物的优点和不足
| Internet shopping is a new way of shopping. It offers a number of benefits for the shoppers. The most important advantage is convenience. You can shop as you like as the on-line shops are open 24 hours a day, and you do not have to queue with other shoppers. Secondly, it is easy to find what you are looking for on the internet. Finally, it is often cheaper to buy goods through the internet.
There are disadvantages too. The main disadvantage is that you can’t actually see the procts you are buying or check their quality. Also many people will miss the opportunity to talk to friends while shopping. Besides, some people are worried about paying for goods using credit cards. In my opinion, the convenience and excitement of on line shopping is beyond all doubts. In the meantime, we must always bear in mind that certain traps do exist, so we’d better make sure the sellers are trustworthy before buying. D. 新手学习状态机，有什么好的方法呢 就是一个记录状态的对象数据操作集，说简单点就是数据状态的变化，计算机编译原理学过后相信会对你很有帮助，去看看那本说讲的自动机 E. 关于“上下文无关文法”的问题
B吧,是编译原理题抄,给你参考吧,我有点忘了.推出的语言是终结符的串 F. 进程上下文的意义 这些代码从可执行文件载入到进程的地址空间执行。一般程序在用户空间执行当一个程序调用了系统调用或者触发了某个异常，它就陷入了内核空间。此时，我们称内核“代表进程执行”并处于进程上下文。在此上下文中current宏是有效的。除非在此间隙有更高优先级的进程需要执行并由调度器做出了相应调整，否则在内核退出的时候，程序恢复在用户空间继续执行。
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