Before the invention of photoengraving, steel and copperplate engraving served as the principal means of reproducing illustratio

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问题 Before the invention of photoengraving, steel and copperplate engraving served as the principal means of reproducing illustrations.

选项 A、visions
B、pictures
C、advertisements
D、pages

答案B

解析插图，图片

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职称英语卫生类B级

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