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Questions 9~11 refer to the following information.
The daily changes of the market can lead investors astray. The ups and downs make the tendency to look at the portfolio’s performance frequently too tempting. This means investors are likely to perceive more risk, forgetting about their long term goals.
When investors log into their trading accounts they can see the potential gain or loss of all of their assets. They can also see the day change on assets which are coded gain and loss. However, it's believed that those who look less get more.
For instance, if you look at FTSE index from today to tomorrow there is a roughly 50% chance that it has gone up or down. If you look at it over a year you may find that 60%-65% of the time it is going up. And if you look over a five-year period you will find that 90% of the time it goes up.
According to the passage, investors tend to________.
此题可用排除法，Ｃ项和D 项可首先排除，Ｃ项错在be attracted by risk，投资者不会被风险吸引：D 项本身意思没有错，投资者会担心市场走势的起起落落，但这是常识，不是文章重点。A 项“投资者趋于关注眼前的得与失，和B 项“投资者会被市场的日常变化误导”，迷惑性较大。结合全文和这两个选项，我们会发现B 项是A 项的一个具体表现，因为关注眼前的得与失，所以才会被市场的日常变化影响，因此A 项更准确。
下列关于公司的表述，正确的是（）
以下各项列举了我国常见气象灾害与其发生地区的对应关系，其中正确的一项是（）
根据电视收视率调査，看体育节目的观众中青年人比中老年人要多。
由此可推断出（）
—种海洋蜗牛产生的毒素含有多种蛋白，把其中的一种给老鼠注射后，会使有两星期大或更小的老鼠陷入睡眠状态，而使大一点的老鼠躲藏起来。当老鼠受到突然的严重威胁时，非常小的那些老鼠的反应是呆住，而较大的那些老鼠会逃跑。
以上陈述的事实最有力地支持了以下哪项假说？（）
疾病控制中心对某校髙中三个年级的学生进行抽样做视力状况调查，抽样的方法为分层抽样（按比例抽样），若高中一、二、三年级学生人数分别为626、703、780，样本容量为84，则应从离二年级抽样的学生人数为多少？（）
