期货公司风险监管指标优于预警标准并连续保持( )个月的，风险预蕾期结束。 A．1

同学能从各个角度看到黑板上的字，是由于光在黑板上发生了______反射．

已知：A公司拟于2009年1月1日购买某公司的债券作为长期投资，要求的必要收益率为知12%。
现有五家公司的债券可供选择，其中甲、乙、丙三家于2007年1月1日发行5年期，面值均为1000元的债券。
甲公司债券的票面利率为10%，6月末和12月末支付利息，到期还本，目前市场价格为934元；
乙公司债券的票面利率为10%，单利计息，到期一次还本付息，目前市场价格为1170元；
丙公司债券的票面利率为零，目前市场价格为730元，到期按面值还本。
丁公司于2009年1月1日以1041元发行面值为1000元，票面利率为8%，每年付息一次的5年期债券，并附有2年后以1060元提前赎回的条款；
戊公司于2009年1月1日平价发行的是面值为1()00元，票面利率为2%的5年期可转换债券(每年末付息)，规定从2009年7月1日起可以转换，转换价格为10元，到期按面值偿还。
要求：
(1)计算甲、乙、丙公司债券2009年1月1日的价值，并为A公司做出购买何种债券的决策。
(2)如果A公司于2010年1月1日以1020元的价格购入甲公司的债券，计算其到期的有效年利率。
(3)如果A公司于2010年3月1日购入甲公司的债券，在什么价位上可以投资
(4)A公司如购入丁公司债券，两年后被赎回，则投资收益率为多少
(5)①计算购人可转债的到期收益率。
②A公司如果在2011年1月1日转股并将其抛售，要获得与到期收益率相同的报酬率，股价应达到多少

法律和党的政策最主要的区别在于前者具有规范性，后者不具有规范性。( )

This week marks the 10th anniversary of the Alar apple scare, in which many American consumers were driven into a panic following the release of a report by an environmental organization claiming that apples containing the chemical Alar posed a serious health threat to preschoolers. The report was disseminated through a PR (Problem Report) campaign and bypassed any legitimate form of scientific peer review. Introduced to the American public by CBS "60 Minutes", the unsubstantiated claims in the report led some school districts to remove apples from their school lunch programs and unduly frightened conscientious parents trying to develop good eating habits for their children.

Last month, Consumers Union released a report warning consumers of the perils of consuming many fruits and vegetables that frequently contained "unsafe" levels of pesticide residues. This was especially true for children, they claimed. Like its predecessor 10 years earlier, the Consumers Union report received no legitimate scientific peer review and the public’s first exposure to it was through news coverage.

Not only does such reporting potentially drive children for consuming healthful fruits and vegetables, the conclusions were based on a misleading interpretation of what constitutes a "safe" level of exposure. Briefly, the authors used values known as the "chronic reference doses", set by the U. S. environmental Protection Agency, as their barometers of safely. Used appropriately, these levels represent the maximum amount of pesticide that could be consumed daily for life without concern. For a 70-year lifetime, for example, consumers would have to ingest this average amount of pesticide every day for more than 25,000 days. It is clear, as the report points out, that there are days on which kids may be exposed to more; it is also clear that there are many more days when exposure is zero. Had the authors more appropriately calculated the cumulative exposures for which the safety standards are meant to apply, there would have been no risks and no warnings.

Parents should feel proud, rather than guilty, of providing fruits and vegetables for their children. It is well established that a diet rich in such foods decreases the risk of heart disease and cancer. Such benefits dramatically overwhelm the theoretical risks of tiny amounts of pesticides in food. So keep serving up the peaches, apples, squash, grapes and pears.

The last month report parallels that on the Alar apple scare in that .()

A. neither really caused worry among the public

B. neither underwent a scientific peer review

C. neither provided statistical supports

D. neither aimed for the public good