个人税收减免措施主要包括（）等形式。
A.税负选择
B.税负转嫁
C.税收抵免
D.费用扣除
E.免征额
参考答案：A, B, C, D, E
体内缺铁初期的最早、最可靠的诊断依据是（）。
A.典型的小细胞低色素性贫血
B.血清总铁结合力增高
C.血清铁减低
D.血清转铁蛋白饱和度下降
E.骨髓贮存铁减少或缺乏
Could you tell me ________ last night?[ ]
A.what you were doing
B.what were you doing
C.what you are doing
D.what are you doing
