某批号83dtex/72f产品的袜带上存在大面积的竹节和僵丝,从工艺角度考虑可能的原因是()。
A.加工速度低
B.定型热箱温度偏高
C.卷绕张力小
D.拉伸倍数低
参考答案:D
荧光显微镜的使用条件是()
A.日光
B.常见光
C.灯光
D.暗室、紫外光
E.激光
Hygroscopic cargoes should be ventilated when().
A.going from a warm to a cold
B.the dew point of the outside air is greater than the dew point of the air in the hold
C.the dew point of the air in the hold is very low
D.the outside dew point is 16°C and the cargo temperature is 12°C