天行赤眼的主要特点是：（）
A.白睛红赤
B.胞睑红肿
C.畏光流泪
D.邻里相传
E.痒涩不适
参考答案：D
采用滚动式编制长期运输计划，其特点和编制方法为（）。
A.逐步延伸
B.远近结合
C.近细远精
D.灵活性强
E.确定滚动间隔期
An analyst does research about exchange trade funds (ETFs). Which of the following statements is least accurate to describe exchange trade funds' characteristics（）
A. Portfolio holdings of ETFs are transparent.
B. ETF's structure prevents a significant premium or discount to NAV.
C. Dividends are reinvested annually for open-end ETFs.
