管路系统在安装过程中,地个别用气焊枪烤焊面积较大的管件的防腐清洁度处理应是()。
A.用风吹扫
B.敲打去氧化皮
C.不做处理
D.二次防腐处理
参考答案:D
Which combination of interest rate options most likely has the same pattern of payoffs as the short position in a forward rate agreement Interest rate call option Interest rate put option()①A. Long Long ②B. Long Short ③C. Short Long
A. ①
B. ②
C. ③
微生物引起的食物中毒常见症状?