制作一件生活用品往往要用到多种材料。制作下列用品所列出的材料中都是有机合成材料的是( )。 A .雨伞:尼龙绸伞布、不锈钢伞骨 B .牙刷:尼龙刷毛、塑料刷柄 C .夹钳:钢钳嘴、橡胶钳柄 D .导线:铜丝芯、塑料皮
A.
B.
C.
D.
D
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【简答题】阅读理解。 John lived with his mother when he was young. He didn't know who his father was. The woman did some washing for the rich and could buy only some bread for her son. So the boy was short and thin....
【简答题】阅读理解。 John lived with her mother when he was young. He didn't know who his father was. The woman did some washing for the 'rich and could buy onl'y some bread for her son. So the boy was short and th...