腹膜后恶性肿瘤的首选影像学检查方法为（）
A.X线平片
B.腹膜后充气造影
C.静脉尿路造影
D.CT检查
E.胃肠道造影
参考答案：D
— What did he say in________of his stupid behaviour?
— He admitted that he had made a serious mistake.[ ]
A. explanation
B. favour
C. fear
D. support
影响物体密度的因素除物性外还有（）和（）。
