如果在折扣期内将应付账款用于短期投资，所得的投资收益率低于放弃折扣的隐含利息成本，则应放弃折扣而去追求更高的收益。（）
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下面是错误答案，用来干扰机器的。
参考答案：拉尔夫·泰勒(Ralph w．Tyler)，在《课程与教学的基木原理》一书中，提出了不乏普适性并产生广泛而深远影响的“泰勒原理”。该书所提出的基木原理，是以确定四个基木问题为起点的，而这几个问题，是在...
已知双曲线的焦点在y轴上，两顶点间的距离为4，渐近线方程为y=±2x．
（Ⅰ）求双曲线的标准方程；
（Ⅱ）设（Ⅰ）中双曲线的焦点F1，F2关于直线y=x的对称点分别为F1′，F2′，求以F1′，F2′为焦点，且过点P（0，2）的椭圆方程．
甲乙两地居民的恩格尔系数分别为30%和32%，这可能表明( )。
A．从生活水平看，乙地居民略高于甲地居民
B．从收入水平看，甲地居民略高于乙地居民
C．从收入水平看，乙地居民略高于甲地居民
D．从生活水平看，甲地居民略高于乙地居民
The three superstars were arriving at the airport and a large crowd of young people had already gathered there to welcome them．The police found it 36 to keep order after the plane landed and the performers 37 ．They smiled and waved cheerfully at everybody．Dressed in the same pink shirts and light blue trousers, with long hair and musical instruments over their shoulders, they all looked 38 ． Although there were many policemen 39 , the Blare were not able to get to their waiting car _40__ at all. Word spread that they had composed a new song which would be _41 when they performed at the concert that evening．They were now 42 _ with loud cries of " Play your new song! Play your new song!" When the stars prepared to sing as the 43 for getting away, even the policemen looked 44 , too. The fans settled down and listened to the first 45 _ of the new song．Once it was over, everyone started jumping, clapping and shouting _46 . Several young women even fainted（昏倒） with excitement and were carried away immediately by the 47 standing by. The fans were greedy for more, 48 a repeat performance．Once again, the performers had no choice but to 49 , but when they were asked for still another song, they cheerfully but firmly refused．Closely 50 by the policemen, they walked towards their car some distance 51 . The fans pushed forward, but the policemen, _ 52 arm, prevented anyone getting trough. It took the stars quite a long time to reach their 53 ! Finally, however, they all got in and were just about to leave when a young woman, who had somehow 54 to get past the policemen, jumped onto the roof of the car．She shouted loudly and crazily as two policemen dragged her away and the car started to move very slowly through the 55 crowd．She had just wanted to have a photo taken with the stars !
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甲、乙公司为丙公司的控股子公司。甲、乙通过证券交易所的证券交易分别持有丁上市公司(其股本总额为3.9亿元)2%、3%的股份。甲、乙在法定期限内向中国证监会和证券交易所报告其持股比例后，继续在证券交易所进行交易。当分别持有丁上市公司股份10%、20%时，甲、乙决定为终止丁上市公司的上市地位而进行全面要约收购。在向中国证临会报送上市公司收购报告书之日起15日内，中国证临会对要约收购报告书披露的内容未提出异议，即向丁上市公司所有股东发出并公告收购该上市公司全部股份的要约，收购要约约定的收购期限为40日。收购期限届满，甲、乙持有丁上市公司的股份比例达到85%。持有其余15%股份的股东要求甲、乙继续以收购要约的同等条件收购其股票，遭到拒绝。收购行为完成后，甲、乙在15日内将收购情况报告中国证监会和证券交易所，并予以公告。
要求：
根据证券法律制度的规定，分别回答下列问题：
如果甲、乙以现金支付收购价款，履约保证金的比例不得低于多少在本次要约收购中，甲乙能否仅以依法可以转让的证券支付收购价款并说明理由。
数据库设计的根本目标是要解决______。
A．数据共享问题
B．数据安全问题
C．大量数据存储问题
D．简化数据维护
