...sp; the center of our planetary system was a difficult concept to grasp in the Middle Ages.A.It is the sun and not the earthB.Being the sun and not the earthC.The sun and not the earthD.That the sun and not the earth疑惑：这道题上课的时候，老师偏向于选择选B。但是...
...个句子，全句为“The meals ship in pre-portioned baggies according to the dog's nutritional needs.”其中文解释为“根据狗狗的营养需求，这些食物装在预先分配好的小包里运送。”我的问题是：ship 一词为什么不用被动语态 be shipped 而用了原...
VOA: 《NASA Makes Progress Toward Deep-space Travel》Saturday from the launch pad at NASA's Stennis Space Center in Mississippi,the serospace agency tested its space launch system. Rockets fired for roughly eight minutes, generating 725 metric tons of thrustwhile guzzling more than 2600 cubic met...
a great deal, a lot 这两个词都可以作副词和名词，意思一样，它们有区别吗?作副词：She’s feeling a lot better now.The boy knows a lot about history.Now the old man is a great deal better.作名词：Thanks a lot She seemed to have suffered a great deal.
...句分析为定语从句。例如：Life as we know it needs water and air to survive.This is history as it was lived by the men of the 505th Regiment.最近偶然间读到南科大的一篇有关于 as一词的学术论文。论文中把传统语法中的“as引导比较分句修饰名词时，as...
...一下这两个例句1.But , the force of geographic conditions peculiar to America , the
interplay of the varied national groups uponone another , and the sheer
difficulty of maintaining old-world ways in a raw , new continent caused
significant changes.问题1: 请教曹老师，主句new contine...
The relative precision with which these dances were conducted might lead to the proposition that they were somewhat mechanical in their execution. However, Schlemmer was not interested in pursuing such mechanical perfection for he considered that the human being should remain at the centre and as pu...
...sexist labor market in the United States and we should use whatever policy tools thatwe have in order to correct that problem. But not everyone agrees.麻烦老师讲解一下这句中的whatever用法，可否看作形容词修饰policy tools ？这里可以和what换用吗？
...midt , the nation's cyber-czar , offered the
federal government a proposal to make the Web a safer place——a voluntary
trusted identity system that would be the high-tech equivalent of a physical
key , a fingerprint and a photo ID card , all rolled intoone.问题2: 请教曹老师，过去分词...
...mathematics. 他的数学(知识)很好。
He has a wide knowledge of history. 他有广泛的历史知识。
It is necessary to have a good knowledge of the essentials of English grammar. 了解英语语法的一些要素是必要的。
2. 我的疑问不包括 have some good knowledge of sth...
...话。“The network must optimize more parameters than there are data vectors to constrain these parameters.” 请问这句话中than的用法，than不是说要在从句中充当成分吗，这句话中than是不是充当了修饰data vectors的形容词或副词？如果是的，那么为什么...
... as。如：~ sb/sth as sth | ~ sb/sth with sth把…视为；以…看待to think about sb/sth in a particular wayWhen the car was first built, the design was viewed as highly original.这种车刚造出时，其设计被认为是独具匠心。