问题 元音舌位

...中的元音舌位应该怎么理解？此图摘自维基百科，Close,mid,open我能理解，但是front,mid,back没懂，根据这个图，/æ/比/i:/，/e/的舌位要后退很多，几乎到了central的位置，但是根据Pronunciation Pairs里 /æ/比/e/的舌位更靠前。而且我记得...

问题 可以分析一下下面这段话的句子结构吗

... 200 B.C. to around 1000 A.D., the most significant example of interaction and long-distance trade was the Silk Road , which stretched across central and southwest Asia,linking China to India, western Aisa, and the Mediterranean.Along the Silk Road, goods,people and ideas travelled  thousands o...

问题 主谓一致疑问(A and B作主语)

In my room is the book and the photograph.这个句子中的 is 用得对吗？为什么不用 are 呢？

问题 为什么不用and连接两个并列成分

人教版七下第8单元中有一句话: It's across from the bank, behind the hotel.这句话为什么没用and来连接，而是用逗号？

话题 read on and on

话题 both economically and environmentally

话题 travel north and south

话题 and for good reason

话题 at home and abroad

话题 dos and don’ts

话题 not A and B

话题 A and B修饰名词

话题 between A and B

话题 and 在否定句中使用

话题 up to and including