抽油机井测电流时要选用一块合适且校验合格的钳型电流表测上下冲程电流
参考答案：对
Air conditioners made in China have won worldwide attentions and GREE has become popular name.
A．a, the
B．/, a
C．/, the
D．the, a
计算机打印输出的记账凭证可适当减少表格线。 ( )
