以下哪项不是估算成本过程的工具？（）
A.储备分析
B.PERT估算
C.卖方投标分析
D.成本汇总
参考答案：D
肿瘤的颜色与下列哪项因素无关（）。
A.组织来源，实质、间质的多少
B.含血量多少
C.继发改变
D.是否含有色素
E.肿瘤的生长时间
Recently some Japanese have been trying to make conflicts with China, ________ attempts we are concerned.
A．whose
B．with which
C．about which
D．about whose
