个人所得税按照课征方式的不同,可以分为()。
A.分类所得税制
B.分级所得税制
C.综合所得税制
D.混合所得税制
E.联合所得税制
参考答案:A, C, D
_____, the weather turned out to be very hot that day.
A.It was said in the newspaper
B.As was reported on the radio
C.Just like the weather report says
D.It so happened as you told me
关于IgA下述哪项是正确的
A.二聚体IgA结合抗原的亲和力,高于单体IgA
B.IgA1主要存在于血清中
C.slgA是膜局部免疫的最重要因素
D.slgA具有免疫排除功能
E.以上均正确