This kind of watches is made_______plastic.And they are made in Guanggzhou.是of还是from

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This kind of watches is made_______plastic.And they are made in Guanggzhou.是of还是from
This kind of watches is made_______plastic.And they are made in Guanggzhou.
是of还是from

This kind of watches is made_______plastic.And they are made in Guanggzhou.是of还是from
填 from
This kind of watches is made from plastic.And they are made in Guangzhou.
这种手表是由塑料制成.它们是在广州制造的.
【解析】
be made of和be made from 都表示"由…制成",主语为制成品.
be made of 表示制成成品后,仍可看出原材料.
be made from 表示制成成品后,看不出原材料.

of.如果是看不到原型物质的就用它。看得到的就用from

from