be made of小学阶段用法
1.The pipes should be made of plastic.这些管子应该是用塑料制作的。
2.The taps appeared to be made of solid gold.水龙头似乎是用纯金制成的。
3.Only the rough guess and estimate can be made of it.对此只能作出一个粗略的测算。
4.They used to be made of pigskin.橄榄球是用猪皮做的。
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solid gold怎么样
