A Master would be well advised to file a note of protest if().
A. Portions of his vessel's cargo were illegally impounded
B. Longshore labor went on strike in a port causing undue vessel delay
Cargo was received at ship side which was damaged in land transit
D. The vessel encountered heavy weather which might have caused bottom damage
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防止虫害的方法主要有化学杀虫法、()杀虫法和()杀虫法。
SPM的效果与输入信号的光强成正比,与光纤衰减系数及有效纤芯面积成反比。()
A. 正确
B. 错误
直流发电系统大都用于()千瓦以下的微、小型风力发电装置,与()配合使用。
定位焊间距视管径大小而定,一般1;250—300mm为宜,且每个焊口不得少于()处。
A. 5
B. 4
C. 1
D. 3