题目内容
Directions:Suppose you are Li Ming and you want to further your study on your major. Write a letter of application to the head of the Registration Department of a university to which you intend to be admitted and the letter should include the following information:1) a brief account of yourself2) your eagerness to study in the university3) and some further remarks.You should write about 100 words on ANSWER SHEET 2. Do not sign your own name at the end of the letter. Use "Li Ming" instead. You do not need to write the ad dress. (10 points)
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当用户画完一个控件后，在该控件的边框上有8个黑色的小方块。当用户单击某个控件时，该控件的四周就会出现8个小方块，这些小方块被称为______，用于调整控件的 ______。
Radiation occurs from three natural sources: radioactive material in the environment, such as in soil, rock, or building materials; cosmic rays; and substances in the human body, such as radioactive potassium in hone and radioactive carbon in tissues. These natural sources account for an exposure of about 100 millirems a year for the average American.The largest single source of man-made radiation in medical x-rays, yet most scientists agree that hazards from this source are not as great as those from weapons-test fallout, since strontium-90 and carbon-14 become incorporated into the body, hence delivering radiation for an entire lifetime. (46) The issue is, however, by no means uncontroversial; indeed, the last two decades have witnessed intensified examination and dispute about the effects of low-level radiation.A survey conducted in Britain confirmed that an abnormally high percentage of patients suffering from arthritis of the spine who had been treated with x-rays contracted cancer. Another study revealed a high incidence of childhood cancer in cases where the mother had been given x-rays. (47) These studies have pointed to the need to re-examine the assumption that exposure to low linear energy transfer presented only a minor risk.Recently, examination of the death certificates of former employees of a West Coast plant which produces plutonium for nuclear weapons revealed markedly higher rates for cancers of the pancreas, lung, bone marrow and lymph systems than would have been expected in a normal population.(48) While the National Academy of Sciences committee attributes these differences to chemical or other environmental causes, rather than radiation, other scientists maintain that any radiation exposure, no matter how small, leads to an increase in cancer risk. (49) It is believed by some that a dose of one rem, if sustained over many generations, would lead to an increase of one percent in the number of 1,000 disorders per million births.In the meantime, regulatory efforts have been disorganized, fragmented, and inconsistent, characterized by internecine strife and bureaucratic delays. A Senate report concluded that coordination of regulation among involved departments and agencies was not possible because of jurisdictional disputes and confusion. (50) One Federal agency has been unsuccessful in its efforts to obtain sufficient funding and manpower for the enforcement of existing radiation laws, and the chairperson of a panel especially created to develop a coordinated Federal program has resigned. (46) The issue is, however, by no means uncontroversial; indeed, the last two decades have witnessed intensified examination and dispute about the effects of low-level radiation.
招标投标是买卖双方为成交某项大宗商品而自由交易的行为，在建筑业中指发包单位(业主)为建造某项工程与承包单位通过遴选达成营造协议的一种方式。这段话主要支持了这样一个论点，即( )。
下面五个数：17/24，1/2，3/8，3/4和9/16，如由大到小排列它们，问中间的是哪个数
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