电子政务系统规划具有的特点和要求有（）。
A、综合性
B、系统性
C、变革性
D、可持续性
E、创新性
参考答案：A, B, C, D
An analyst does research about audit opinions. A disclaimer audit opinion is most likely issued when:（）
A. financial statements are prepared with some limitation or exceptions according to the accounting standards.
B. auditors are unable to issue an opinion about financial statements.
C. financial statements are materially depart from accounting standards and not fairly presented.
白云鄂博白云石型铌矿的边界品位为（）。
A.0.5%
B.0.05%
C.0.1%
D.0.3%
