According to the last paragraph, which of the following statements is true?
A．Genetically modified foods have been supervised by the authority.
B．Genetically modified foods have proved to be safe.
C．The nonengineered foods absolutely can be contaminated by the engineered foods.
D．The engineered foods are immediately profitable for the food companies.

未分类题By saying that 'London has 32 library authorities but just one police authority,' Desmond Clarke means that______.A．the management of London's police system is less professional than that of London's library systemB．the supervision system of London's libraries is more complete than that of London's police systemC．the organizational structure of London's libraries is more complicated than it is necessaryD．the organizational structure of London's libraries is superior to that of London's police system

未分类题现金流量主要由以下几个部分构成()。

未分类题The word 'stagnate' in Paragraph 3 probably means______.A．deterioratingB．indebtingC．flourishingD．stopping developing or advancing

判断题证券投资收益的最大化和投资风险的最小化这两个目标往往是矛盾的。()

未分类题From the first two paragraphs, we learn that______.A．aging brains tend to process more information simultaneouslyB．one becomes forgetful when he gets oldC．older people don't think their brainpower is decliningD．the aged always stress long-term benefit

判断题证券市场线一般用于估计一种证券的预期收益率，而证券特征线则用于描述一种证券的实际收益率。()

未分类题From the first paragraph, we can learn that investors confidence in German economy is .A．weakB．increasingC．optimisticD．subtle

判断题资本市场线上的每一点都表示由市场证券组合和无风险借贷综合计算出的收益率与风险的集合。()

未分类题From the fifth paragraph, we can infer that______.A．Europe needs the extra economic growth from a transatlantic trade dealB．America is enjoying a moderate economic revivalC．Europe in any way won't cut their liaison with AmericaD．The transpacific pact is beneficial to both Europe and America

未分类题What is the authors attitude towards European reaction against American spying?

未分类题Which of the following can be the best title for the text?A．The euro-zone economyB．The euro-zone unemploymentC．The euro-zone low-inflationD．The euro-zone recovery

判断题在市场的均衡状态下，有些证券在切点组合T中有一个非零的比例，有些证券的组合中的比例为零。()

未分类题亲系分为()

未分类题下列属于旁系姻亲的有()

判断题投资者如何在有效边界中选择一个最优的证券组合，取决于投资者对风险的偏好程度。()