—_________ does your father do? —He's an engineer.[ ]
A. Who
B. Which
C. What
答案:C
卵巢无性细胞瘤较好的肿瘤标记物为()
A.CA125
B.AFP
C.hCG
D.LDH
E.CA19-9
压实分初压、复压和终压。初压应采用()。初压后应检查(),必要时应予以修整。
A.串联式双轮振动压路机或轮胎压路机;宽度和厚度
B.钢轮压路机或振动压路机(静压);平整度和路拱
C.光面钢轮压路机或振动压路机(静压);平整度和路拱
D.钢轮压路机或振动压路机(振动);宽度和厚度