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问题 temperature后面为什么有 at which

For some substances， such as steel，the temperature at which it becomes a liquid is much higher.请问temperature 后面为什么有at？这个which是指代steel吗？

问题 arrive后面为什么没有介词

This is not because a person arrives his natural limit of efficiency when he reaches the sixth grade,for it has been shown again and again that with special tuition so many older children,and also adults,can make enormous improvement.

问题 easy reading的用法疑问

牛津词典例句:For all its clarity of style, the book is not easy reading. 这本书虽然文体清晰，但读起来并不容易。为什么后面是easy reading 呢？这是主动表被动吗？如果是，为什么不是easy to read呢？麻烦老师对easy reading 从主动表被动和d...

问题 about four metres long 是什么状语

About four metres long, the room served as a small reception hall for important visitors .问：这句中About four metres long，在这句中应该被称作主句的什么状语？

问题 出现多个and的句子

...gize how to turn things in your favor and land the job you've been looking for.该句子中出现2个and，是否应该将第一个and改为逗号，谢谢

问题 表示“谋生”living与哪些动词搭配

...doing all kinds of things. 她做各种各样的活计来谋生。 So for years men have turned to the sea to make their living. 因此多年以来人们转向海洋谋生。老师说，living 不能与 gain, win 搭配。问老师为什么，老师说这是惯用法，没有解释的...

问题 symbol前用不用冠词与用不用复数的疑问

有这样一个句子：However, the best representatives for Beijing are the vanishing Hutongs and square courtyards. Through hundreds of years, they have become symbol of Beijing’s life. Tian’anmen square is still brilliant today with cloverleaf junctions and skyscrapers everywhere.其中的 t...

问题 状语从句修饰的是哪个词

Waiting for final results, these students have decided to throw a party to reduce stress.请问老师这句话里waiting for final results, 修饰的是哪个动词或者形容词？

问题 不同时态的arrive 和 will arrive 含义区分

...ing at the small blue light in the ceiling, or fumbling to find you ticket for inspection. Inevitably you arrive at your destination almost exhausted.......The journey is so smooth that there is nothing to prevent you from reading or sleeping. However you decide to spend your time, one thing is cert...

文章 英语基础语法快速入门——冠词

...“几个半……”时，我们总是说…and a half。如：I waited for an hour and a half [one and a half hours]. 我等了一个半钟头。 四、冠词的基本用法1. 不定冠词的基本用法什么叫不定冠词？从字面上看，它就是表示不确定意义的冠词，如表示...

问题 before后面可以接过去分词吗

The cars are tested for defects before they are sold. 假若要把时间状语从句 before they are sold 改为短语，可以是 before sold 吗？即省略从句的主语（因为它与主句主语相同）和动词are。但老师说给出的答案是 before being sold。请问如果写成 b...

问题 关于关系代词和定语从句的疑惑

书上讲关系代词时，举了如下一个例：She came back for the pencilbox which she had forgotten. (which 指物，在限定性定语从句中作宾主，可以省略)以上是书上原话，我的疑惑是什么叫宾主？作宾语但是用主格形式吗？ 这里 which 作的从句宾...

问题 动词 water ski 是什么构词法

He waved desperately to his companion, who had been water skiing for the last fifteen minutes.这句话的water ski是动词？为什么会有这种动词，这不符合语法啊，无论它是双谓语还是名词+动词。

问题 现在完成式的表意理解

...可能结束也可能持续下去? 如例句:He has worked in the company for 20 years.这句是表示他已经工作20年，但以后不工作了，还是工作到现在还会一直工作下去?

问题 作保留宾语的关系代词是否可以省略

But surely the strategies you were taught for dealing with that vocabulary were helpful.这是师生对话材料里的一句话。各位老师，如果是书面语体，作保留宾语的关系代词是否可以省略？我查了下资料，没见到具体说法。