付款时审核的内容不包括（）
A.单据的匹配性
B.单据的规范性
C.单据的有效性
D.单据的真实性
参考答案：C
预防甲状腺肿的碘化食盐，常用剂量为每10～20kg食盐中均匀地加入碘化钾或碘化钠（）
A.1.0g
B.2.0g
C.3.0g
D.4.0g
E.5.0g
According to the speaker, what do people often think about astronomers a. They spend most of their time looking through telescopes. b. They are constantly analyzing data. c. They often live near observatories. d. They devote a lot of time to theoretical problems.
