中又催化装置的原料通常是()
A.减压渣油
B.馏分油掺减渣
C.馏分油掺常渣
参考答案:C
The people, _____ had been damaged by the flood, were given help by the Red Cross. [ ]
A. all whose homes
B. all of whose homes
C. all their homes
D. all of their homes
()是流媒体文件格式。
A.ASF
B.WAV
C.GIF
D.AVI