焊接厚件、高熔点、导热性好的金属材料，应选较大火焰能率进行焊接。 ( )
参考答案：对
There have beenlittle change in the patient’s condition since he was moved to this room.
A B C D
即开型 * * 的返奖率是多少？（）
A、50%
B、65%
C、60%
D、59%
