截割过程中要随时注意个部件的声音和温度，一般液压油温度不超过（）.
参考答案：70℃
It's too _____ outside.You had better wear your coat.[ ]
A. hot
B. cool
C. cold
“随附单据”栏应填( )。
A．发票
B．装箱单
C．发票、装箱单
D．此栏不填
