第5题: [单项选择]对恒定混合策略最有利的市场环境是( )。 A. 牛市 B. 熊市 C. 无明显趋势 D. 强趋势 参考答案:C 答案解析:[解析] 当市场处于易变的、无明显趋势的状态时，恒定混合策略的表现优于买入并持有策略，而投资组合保险策略的表现劣于买入并持有策略。反之，当市场具有较强的保持原有运动方向趋势时，投资组合保险策略的效果将
第23题: [单项选择]Students self-rating on "emotional health" and "physical health" reached all-lime lows. The reason may be ______. A. the increasing competitive pressures B. problems at home C. increasing stress D. strong interest in health protessions 参考答案:B 答案解析:文章第三段指出"Problems at home may be a cause”，即家庭内部的问题可能是导致学生身心不够健康的一个原因，同时作者近一步指出"high percentages of fr
第33题: [填空题]Confusion and tiredness usually happen to those flight crews on international routes because most probably they have to suffer the differences in time zones. 参考答案:Y 答案解析:[解析] 根据本文Working Conditions部分最后一段“Flight crews，especially those on international routes，often suffer
