190系列柴油机中,两排呈V型排列,其夹角为()度。
A. 50
B. 60
C. 100
D. 20
The International Sewage Pollution Prevention Certificate (ISPP) is issued to ()
A. ships of above 200 GT to MARPOL
B. every ship of 400 GT and above
C. all ships
D. ships of more than 200 GT but less 400 GT
PageMaker文件若用于网上发布,通常采用()格式。
A. PICT
B. GIF
C. HTML
D. PDF