设备清洗中除应遵循常规的技术要求外，还应注意加工表面的锈蚀处，用油无法擦去时，可用棉布蘸( )擦去。
A．酒精B．香蕉水C．丙酮D．醋酸
参考答案：D
Mike: Mother, this my friend, Paul.
Paul: Nice to meet you, Mrs Brown.
Mrs Brown: Nice to meet you, Paul .
Mike: And these are my grandparents, Kevin and Emma Brown. That’s my brother , Bob, and this is my cousin, Tim.
Paul: Hello! And is this your sister ?
Mike: Yes, this is Jenny.
小题1:Paul and Mike are brothers .
小题2:Mike and Tim are cousins.
小题3:Kevin and Emma are Mike’s grandparents.
小题4:Mike has two sisters .
125+125+125+125=（ ）×（ ）
