Six million hand driven rivets and 53,000 tonnes of steel were used in its construction.
这里面填的were used 和 have been used 有什么区别呢？ 一个是强调过去的事实 ，一个是和现在还有关注，或者对现在还有影响？ 求指点！
...ionary, the birds would shift their direction with respect to it at a rate of about 15 degrees per hour.这里with respect to it感觉去掉也可以，为什么要这么用，此句上一句是 In experimenting with artificial suns, Kramer made another interesting discovery.
句子：All this may help explain the government’s surprising embrace of private charity, not something people are supposed to need in a proletarian paradise.请问，这里的not something到底是什么成分? 是否是加了否定词的同位语，修饰private charity?又或=which is not some...
In the 2006 film version of The
Devil Wears Prada ,Miranda Priestly, played by Meryl Streep, scolds her unattractive assistant for imagining that high fashion doesn’t affect her.如何判断此处imagining的逻辑主语是assistant还是Priestly？
... soaring energy costs, will slow if not stop economic
growth in many parts of the world and will even undermine political stability. 食物以及能源价格的飙升如果不停止，将会减缓世界很多地区经济的发展，甚至还将破坏政
治稳定。if not stop做什么成分，是...
in recent years 与 recently 同义吗？它是不是也经常与现在完成时连用呢？如：
India has seen many political changes in recent years. 印度近年来经历了很多政治变动。
Unemployment among the over forties has risen sharply in recent years. 最近几年...
In their another experiment, the scientists found that people who preferred sweet food, such as cookies and chocolate, were more willing to help other people in need.请问：本句的 In their another experiment，是否正确？
The pictures in books/ are distinctive/ from the fleeting images /(that)kids see on television in that they remain on the page, ready to be revisited, touched, and commented upon。in that 是“因为”的意思（网络上有这个意思，牛津字典没有查到）是引导原因状语吗？...
One
day in February 1824, at his little house in Vienna, Austra, Ludwig van
Beethoven sat back in his chair and smiled.这是2020版高中英语北师大版必修第三册第7单元(p14)的句子。请问这里为什么用介词at，可以换成in吗？
...他的工资减少到原来的水平。He is engaged in
the organization of a new club. 他正忙着组织一个新的俱乐部。The organization
of the games is the duty of one of the teachers. 运动会的组织工作由一位教师来负责。They blamed the
government for the poororganization ...