皮皮学，免费搜题
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搜题
【判断题】
手工电弧焊时，酸性焊条比碱性焊条更容易产生金属热反应。()A.
正确
B.
错误
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】A．She is at school. B．She is at the library. C．She is at tile swimming pool. D．She is at home.
【单选题】What is a fee of $27 for?
A.
The registration fee.
B.
The weekly cost for bed, breakfast and dinner.
C.
The fee of the first course.
D.
The cost of the tax for the course.