Product descriptionPOWERSIL® XLR 630 A/B is a especially low viscous two-component compound with excellent processing properties. The vulcanized rubber is noted for the good mechanical properties as w
连词单项选择1.______ I am willing to help, I do not have much time available.A.Until B.Since C.While D.Whether2.I was doing my homework ________ it suddenly rained.off
完形填空专题(一)Nowadays school students hardly pay much attention to sports. Is it becau they don’t have any __1__ in sports? It may not be the __2__. They often say they have other more important things