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问题 请问这句话是定语从句吗？

...ct License"), issued only by ej-technologies or its authorized agents to a designated user may be required according to the following agreement.软件许可证和许可证密钥或序列号（“软件产品许可证”），只能由EJ-技术或其授权代理人签发给指定的用户可以...

问题 动词变名词表职业为什么有的加er有的加or（核心区别是什么）

请问，动词变名词表职业，为什么有的加-er；有的加-or？它们的核心区别是什么？从历史渊源、文化、构词法等方面解释都行。万分感谢！第一次上贵站……

问题 or almost done recovering from a broken nose，done为

As if they were all suffering from a sleepless night, or almost done recovering from a broken nose. 问大神，done为什么会在ing前面？网上看这里是be almost done？recovering只是补充？

问题 肯定句改成一般疑问句是否一定要将and改为or？

...。比如：The seal ate some fish and crabs.Did the seal eat any fish and/or crabs?最好能提供权威的对这个问题的描述，现在好多书都是抄来抄去，说的也不清楚，谢谢

问题 关于介词宾语从句的疑问

...should increase the financing of pure science at the expense of technology or vice versa 【主语从句】//often【频度状语】 //depends on【谓语动词】// the issue of which is seen as the driving force.【宾语】在该句中，最后这部分，of which…force做the issue的后置定...

问题 比较分句中的主语省略

...He always goes further than it is considered acceptable or correct for him to go.真正的主语是for him to go为动词不定式，不是嵌入分句。是否可以得出结论，动词不定式作主语，并且有形式主语it，比较分句中的主语也可以省略。

问题 on a diet of什么意思

 Its teeth and skeleton lead scientists to believe Spinolestes was a “ground dweller” that survived on a diet of bugs.查了下字典 a diet of 有大量单一的事物的意思？这里是这个意思么？还是饮食习惯？

问题 这里为什么不是on？

These hotspots are significant because they allow us to locate key areas for focusing efforts at conversation.雅思听力这句话，为什么是focusing efforts at conservation 而不是 on呢?

问题 fron then on后跟什么时态（一般过去时还是现在完成时）

From then on, I ______ to the forest four times a year.   这是一篇完型里面的。答案：A. had gone        B.  have gone        C. went            ...

问题 which, that, 限定性，非限定性定语从句

...E3-54:I immediately embarked on an experiment which, even though it failed to get rid of the ants, kept me fascinated for twenty-four hours. Question:如果这是限定性的定语从句，表达重要信息。所以，这句话，如果是我写的话，应该把 which，换成 that.I immediately ...

问题 表示在某场合occasion前用介词on与at

...了。 但在网上看到一个用 at 的例子： Valentino is keen to see celebrities parading his clothes at big occasions. 瓦伦蒂诺喜欢看名人在重大场合展示他设计的服装。 请问像这样用介词 at 也可以吗？它与用介词 on 有什么区别呢？

问题 句子成分分析

A：What do you mean by a friend?B：To me friendship... having friends, people I know I can really count on... to me that's the most important thing in life. It's more important even than love. If you love someone, you can always fall out of love again, and that can lead to a lot of hurt feelings, ...

问题 为何有些及物动词后面没宾语(是省略还是固定结构使然)

... 'I love you more than I can express, or can ever hope to express.'express 是及物动词，为何这里的 express 后没接宾语。有一首歌这样唱到：I'm trying hard to let you go. But it's more than I can do. And every day or two. I wind up right...

问题 They have no independent thought or creative ideas

为什么thought单数，idea复数？

问题 The typhoon inflicted severe damage on the island.

请问老师on能换成to吗？ 谢谢！