His first essay was a plea for mercy to animals. Already the boy was showing that deep sympathy for the suffering which was to be so characteristic of the man.问：which 引导的定语从句中so 是什么意思？帮我分析一下这个定语从句的成份，谢谢专家。
It may bring a reprieve for the whale populations currently protected in international waters but at a very high price.这里与but并列的部分是bring a reprieve吗，相当于it may be at a very high price?
Consumers may be willing to buy a company's products as an indirect way to donate to the good causes it helps. 请问这里的as an indirect way在这里是作宾补吗？前面哪个动词可以后跟宾语后跟宾补呢？
The airwaves are a shared medium to improve performance, you need to be spectrum efficient 802.11ac is all about optimization to do that. 请帮忙分析一下，逗号后的句子，结构上怎么断句？
the deficiency which I note in chief lies in the fact that what I had meant to be the main，while explicitly enough stated in the book, remains for every practical end indiscernible.
如何理解这里的main名词意思？
Advertising media like direct mail, radio, television and newspapers_____to increase the sales of industrial products.A.have been usedB.will be used请问选哪一个？为什么不选另一个？
Romance and language sang songs to me, and I was inspired to be, like him, not a hero nor even a poet, but a Greek scholar, and thus an instrument on which beautiful words might play. 这句话中的and thus…是什么成分？
The basis of representation therein shall be reduced in the proportion which the number of such male citizens shall bear to the whole number of male citizens twenty-one years of age in such state.分不清这个定语从句中which, bear和to the whole number的结构。