按现行的 * * 结构，我国政府预算分为( )级预算进行管理。
A．二
B．三
C．四
D．五
参考答案：D
谐波成像在临床中应用，不包括（）
A.基波显像良好的脏器
B.增强心肌和心内膜显示
C.增强心腔内声学造影剂的回声信号
D.增强细微病变的分辨力
E.减少近场伪像及近场混响
(one, two, three, four, five / book, books) __________________
(one, two, three, four, five / book, books) __________________
(one, two, three, four, five / book, books) __________________
(one, two, three, four, five / book, books) __________________
(one, two, three, four, five / book, books) __________________