The Brief History of Time ___ by Steven Hawking. It is a great book about science.A is written B was written 难道该句子只能用被动态的过去时？有无可能用一般现在时来被动表示“客观的常识，还有常态化的含义？
...also, that his power to follow a long and purely abstract train of thought was very limited, for which reason he felt certain that he never could have succeeded with mathematics。非限制性定语从句，which代表前面一整个句子，没看懂这个which与reason的关系是什么？
It was next to a piece of paper with a very strange message on it.请问老师这里如果去掉on it 变成paper with a very strange
message 可以吗？with本身不就有"有"的意思吗，例如 a man with a
book，这两个结构有什么区别呢？
UV-H2O2
photo-oxidation technology was only available for the advanced treatment of
low-turbidity water with a critical limitation of 6 NTU turbidity. H2O2光氧化技术适用于低浊度水的深度处理，降解效果以浊度6 NTU为分界点。请问老师这里的critical怎么理解？
请问这句话中try to choose local products在句中作什么成份，感觉像两句话，情分析下句子结构。Think about how much energy was used to get it to us try to choose local products.该句来自2022北京中考阅读。
On
Sunday, after morning service, the separation, so agreeable to almost all, took
place. Miss Bingley's civility to Elizabeth increased at last very rapidly, as
well as her affection for Jane; and when they parted, after assuring the latter
of the pleasure it would always give her to see her either...
If you think about it for a moment, it makes total
sense. When you smell something good or hear amusing sounds, certain emotions
are awakened. Think about how newborns use their senses to understand the world
around them. They don’t have emotions so
much as needs — they don’t feel sad, they’...