TIME杂志，2012年2月14日电动车的一篇文章。Kilometer per kilometer, electric cars in China beat out conventional vehicles as among the worst environmental polluters. Kilometer per kilometer是什么用法，查字典没找到这种A per A的用法
A visually-challenged man
from Beijing recently hiked (徒步)
40 days to Xi’an, as a first step to journey the Belt and Road route (路线) by foot.上面的文段摘自2022年高考英语全国甲卷（全国卷Ⅱ）的完形填空。请问visually-challenged如何理解？
...何修饰语。但这个规则有少数的例外。比如：
Child as he is, he knows to help other. 他虽然是个孩子，但知道帮助别人。
He was a medical student before he turned writer. 他在成为作家之前是学医的学生。
我想知道，除上面两句外还有哪些类...
It's no pleasure looking through these any longer because nature is one
thing that really must be experienced.问：此句中句型“It's +n.+doing sth.”,有没有“It's +n.+to do
sth.”的句型？另外在此句型中什么时候该用doing sth 作句子主语，而什么时候又该用to do ...
...coming to Jeff's party？
—I'm not sure． I＿＿＿＿ go to the concert instead．A.must B.would C.should D.Might 这题选D，我能理解，但是为什么C不可以呢，should 我可以表示推测，或者可能，具体在表示推...
He said Google has made improvements since then and was confident it could deliver games in the largest high definition standard, 4K, and running at 60 frames a second.最后and running让人摸不到头脑，running我觉得是deliver的伴随状语，可是为什么要用and连接？难道这是...
我一直以为whether作conj无论的时候后面要是完整的句子，但是有的时候讲不通：句子一：Poor farmers, whether owners or tenants, will be worst affected. 句子二：They have undergone treatment, whether in the camps or at clinics. 我考虑这种用法是不是...