1月11日的上海雅思听力总体不难，SCTIONG4略有难度
是关于各种材料的运用的。
1。there is some man-made materials ,such as(plastic)
2.before using,materiel should undergo (process)
3.wood should be cut and (seasoned)
4.stone should be cut and (polished)
5.(cost)should be considered
6.materials should (       )(没听清）,according to type,sharp,etc.(凭经验，我写了be used.)
填表
7.一种材料的反光率：0。8
8...[查看详情]