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搜题
【单选题】
What is one way the professor mentions that chemists can help with art restoration?A.
By re-creating the pigments and binding agents used by artists of earlier eras
B.
By removing pigments and binding agents that dissolve paintings over time
C.
By creating protective coatings of paint that do not damage original paintings
D.
By developing ways to safely remove paint added by previous restorers
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参考解析：
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皮皮学刷刷变学霸
举一反三
【判断题】霍尔传感器的优点:灵敏度高、线性度好、稳定性高、体积小、重量轻、寿命长、安装方便、功耗小、频率高(可达 1MHz )、耐高温、耐震动、不怕灰尘、油污、水汽及盐雾等的污染或腐蚀。
A.
正确
B.
错误