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{{B}}U.S. to Start
$3.2 Billion Child Health Study in January{{/B}} A study that will cost $3.2 billion and last more than two decades to track the health of 100,000 U. S. children from before birth to age 21 will be launched in January, U. S. health officials said on Friday. Officials from the U.S. government’s National Institutes of Health said they hope the study, to be conducted at 105 locations throughout the United States, can help identify early-life influences that affect later development, with the goal of learning new ways to treat or prevent illness. The study will examine hereditary and environmental factors such as exposure to certain chemicals that affect health. Researchers will collect genetic and biological samples from people in the study A. conduct research. B. track public health. C. prevent or treat illness. D. speed up development. [简答题]什么是内扰？什么是外扰？如何正确判断？
[单项选择]Questions 11 to 18 are based on the conversation you have just heard.
A. John was disappointed at his math score. B. John did better than he thought he was able to. C. John didn’t pass, although he had tried his best. D. John got an excellent score, which was unexpected. [填空题]通过某省审定的林木品种，相邻省属于同一适宜生态区进行引种由原法的“需所在省、自治区、直辖市人民政府林业主管部门同意”改为“（）”。
[填空题]任何两个竞争者之间的市场份额之比为 （ ）时，可能是（ ）。
[填空题]电流互感器的稳态比误差不应（ ）_。
[填空题]院前急救的先导是_____。
[判断题]工作票由工作负责人填写，也可由工作票签发人填写。
A.正确 B.错误 [单选题]（ ）应了解有限空间作业过程中存在的危险、危害因素；确认作业环境、作业程序、防护设施、作业人员符合要求后，授权批准作业。
A.作业负责人 B.作业人员 C.许可人 [多项选择]证券市场的层次性体现为（）的多样性。
A. 区域分布 B. 覆盖公司类型 C. 上市交易制度 D. 监管要求 [单项选择]当工程师指示承包商对已完成的工程进行剥露凿开检查时，如质量合格，关于承包商的索赔，下列说法中正确的有（）。
A. 只能提出费用索赔 B. 不能提出索赔 C. 可以提出费用索赔和工期索赔 D. 只能提出工期索赔 [单项选择]以下哪项不是湿热下注型痛经的主证 （）
A. 经前小腹刺痛 B. 有灼热感 C. 伴腰骶胀痛 D. 低热起伏 E. 经色黯红，质稠有块 [填空题]一切电话中断时,双线区段禁止发出( )列车。
[单项选择]According to the passage, China is a leading buyer of _________.
A. personal computers B. semiconductor-manufacturing equipment C. radio D. television sets [单项选择]不同含液性病变的后方回声增强强度不尽相同，其中后方回声增强相对不显著的是（）
A. 胆总管囊肿 B. 肾囊肿 C. 淋巴管囊肿 D. 血肿 E. 膀胱憩室 [单选题]行政许可法自（ ）起施行。
A.42979 B.2011年6月30日； C.38169 D.40354 我来回答: 提交
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