换热器在检修前应做好相应的档案资料。
参考答案：对
After ________ his right arm, he keep on ________ with his left arm.
A．lose; write
B．losing; writing
C．losing; write
D．lose; writing
纳税人自产自用的应税消费品用于连续生产应税消费品的不纳税；用于生产非应税消费品的，于移送使用时纳税。( )
