单项选择题 How is the burden of the tax shared between buyers and sellers?  Buyers bear A、three-fourths of the burden, and sellers bear one-fourth of the burden. B、two-thirds of the burden, and sellers bear one-third of the burden. C、one-half of the burden, and sellers bear one-half of the burden. D、one-fourth of the burden, and sellers bear three-fourths of the burden.

单项选择题 根据现行《建筑安装工程费用项目组成》(建标［2013]44号)，应建设单位要求对结构件进行破坏性检验发生的费用应由( )列支。

单项选择题 对原电池，负极极化曲线即阴极极化曲线。（ ）