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单选题
176、在裸露的金属上涂一薄层密封胶
A
Apply a thin layer of sealant on the bare metal.
B
Spread a thin layer of sealing compound with a brush on the surface of the bare metal.
C
Spray a thin layer of sealing compound on the metal sheet.
答案解析
正确答案：A
解析：
解析:注释: bare 裸露的,赤裸的。apply=spread 涂; spray 喷涂。
相关知识点：
裸露金属涂薄层密封胶
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