| Economists believe that investors are
rational, and that stock prices are therefore unpredictable. It sounds peculiar,
but the logic is ironclad. Rational investors would take into account everything they know when buying or selling stock — all the information available about where profits, interest rates, technology and so on are going. So stock prices would reflect all available knowledge, and would change only when new information came in. And new information is, by definition, unpredictable, which means that changes in stock prices would be unpredictable, too. But investors, being human, are driven by fear, greed and the madness of crowds. In principle this should create patterns in stock prices, and in principle you can use those patterns to outperform the market. But while it may be very hard to tell, whether the A. investors are not always rational B. stock price reflects all available knowledge C. a rational investor should be good in prediction of the market D. because new information is unprediction it is hard for investors to be rational [判断题]李某因涉嫌犯罪被公安机关取保候审，在取保候审期间，李某不能行使选举权。
A.正确 B.错误 [单选题]停电检修时，在开关上应悬挂（）的标识牌
A.在此工作 B.止步，高压危险 C.禁止合闸，有人工作 [简答题]大体积的混凝土墩台及其基础，在混凝土中埋放石块时应符合哪些规定？
[单项选择]患者26岁，男性。2周前感冒。3天前背痛，同时觉双足、小腿发麻，尚能行走。次日麻木向大腿发展，走路时双足不灵活，迈步费劲。小便费劲。检查：双下肢肌力1～2级，肌张力低，腱反射对称减低，病理征阴性。T8以下各种感觉消失，下述哪项是最可能的诊断（）
A. 脊髓灰质炎 B. 急性横贯性脊髓炎 C. 多发性硬化 D. 脊柱转移性肿瘤 E. 急性硬膜外脓肿 [单项选择]直肠癌最主要的诊断方法是（）。
A. 钡灌肠X线检查 B. CEA测定 C. 纤维结肠镜检查 D. 腹部B超 E. 直肠指检 [单项选择]某房地产开发公司开发建设的住宅小区，建设工期10个月，工程合同价为1000万元，按照规定，该开发公司申领《施工许可证》时的到位资金应不少于( )万元。
A. 100 B. 150 C. 300 D. 500 [多选题]桔梗的主治证有:
A.咳嗽痰多,胸闷 B.咽喉肿痛 C.胸痹 D.肺痈 E.心下痞 [单选题] 李某在张某的胁迫下签署了一份将自己房屋卖给张某的合同,该合同行为属于( )。
A. 无效民事行为 B. 效力待定民事行为 C. 合法民事行为 D. 可撤销民事行为 [判断题]我国铁路线路上直线轨底坡采用1:40
A.正确 B.错误 [单选题]当350m>曲线半径≥300m时,其轨距加宽值为（ ）mm。
A.0 B.5 C.10 D.15 [判断题]洗涤塔出口温度越低越好( )
A.正确 B.错误 我来回答: 提交
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