单项选择题 如图所示悬臂梁，当单独作用力F时，截面B的转角为θ，若先加力偶M，后加F，则在加F的过程中，力偶M（ ）。

未知题型 The word 'paramount' (Paragraph 4) may be replaced by ______.A.vitalB.more importantC.less importantD.similar

未知题型 It is hard to predict how science is going to turn out, and if it is really good science it is impossible to predict. If the things to be found are actually new, they are by definition unknown in advancE.You cannot make choices in this matter. You either have science or you don't, and if you have it you are obliged to accept the surprising and disturbing pieces of information, along with the neat and promptly useful bits.The only solid piece of scientific truth about which I feel totally confident is that we are profoundly ignorant about naturE.I regard this as the major discovery of the past hundred years of biology. It is, in its way, an illuminating piece of news. It would have amazed the brightest minds of the 18th century Enlightenment to be told by any of us how little we know and how bewildering seems the way aheaD.It is this sudden confrontation with the depth and scope of ignorance that represents the most significant contribution of the 20th century science to the human intellect. In earlier times, we either pretended to understand how things worked or ignored the problem, or simply made up stories to fill the gaps. Now that we have begun exploring in earnest, we are getting glimpses of how huge the questions are, and how far they are from being answereD.Because of this, we are depresseD.It is not so bad being ignorant if you are totally ignorant; the hard thing is knowing in some detail the reality of ignorance, the worst spots and here and there the not-so-bad spots, but no true light at the end of the tunnel nor even any tunnels that can yet be trusteD.But we are making a beginning, and there ought to be some satisfaction. There are probably no questions we can think up that can't be answered, sooner or later, including even the matter of consciousness; to be sure, there may well be questions we can't think up, ever, and therefore limits to the reach of human intellect, but that is another matter. Within our limits, we should be able to work our way through to all our answers, if we keep at it long enough, and pay attention.The author claims that good science ______.A.defies predictionB.should study the unknownC.should discover scientific truthD.should offer choices rather than prescribe

单项选择题 某公司发行股票，当时市场无风险报酬率为6%，股票投资平均报酬率为8%，该公司股票β系数为1.4，则该公司股票的资本成本为（    ）。 A. 6% B. 7.4% C. 8% D. 8.8%

未知题型 The word 'vent' (Paragraph 1) most probably means ______.A.hideB.repressC.speakD.let out

单项选择题 实二次型为正定的充要条件是（ ）。

未知题型 2002年8月，户口在甲区的张甜为做生意向户口在乙区的李密借款10万元，约定于2003年12月底之前归还。后张甜因犯抢劫罪，于2004年1月被丙区人民法院判处有期徒刑5年并关押在丙区监狱服刑。此外，自2004年1月起，李密即开始在丁区居住。2005年3月，李密决定向人民法院起诉，要求张甜偿还所借的10万元钱，李密应当向下列哪一个人民法院起诉?( )D.丁区人民法院

单项选择题 现场处置方案是生产经营单位为应对某一类型或某几种类型事故，或者针对重要生产设施、重大危险源、重大活动等内容而制定的应急预案。

未知题型 甲公司与乙公司签订了加工承揽合同，甲公司为乙公司加工一套机器设备，乙公司后来发现丙公司的加工价格比甲公司低30%，乙公司遂又与丙公司签订了合同，乙公司通知甲公司不要甲公司继续加工了，甲公司告知乙公司为乙公司加工的设备已完成80%的工作量，而且该设备是根据乙公司的要求定做，甲公司无法将设备转卖，甲公司要求乙公司继续履行合同，甲公司将设备加工完成后，按照合同约定的期限交付给乙公司时，乙公司拒绝受领，甲公司将设备交于公证处提存，甲公司将设备提存后，天气连日干燥，某日突降雷雨，闪电将公证处仓库旁边的枯树点燃，仓库失火，将提存的设备烧毁，但是设备仍存有50%的价值，以下说法正确的是( )D.乙公司有权随时要求无条件领取残余设备

未知题型 东方造船厂(一般纳税企业)与中远公司签订了一份建造合同WY,承建一艘船舶。合同总价款为 678.6万元(合增值税)，完工时间为2001年8月31日；同时规定，该合同若能提前2个月完工，且工程优良，则另支付奖励款23.4万元(含增值税)。工程于 1999年2月开工，最初预计工程总成本为550万元；至2000年底，由于钢材价格上涨等因素将工程预计总成本调整为600万元；2001年6月25日工程完工，经验收确认工程优良冲远公司同意支付奖励款。合同期间每年发生的成本．结算的合同价款及实际收到的价款如下：(单位：万元)1999 2000 2001已发生的成本 154.00 203.58 198.50已结算合同价款 480.00 346.32 339.30(含增值税)实际收到价款 595.00 152.10 163.80(含增值税)假设该合同适用增值税税率为17%，不考虑其他税费。根据上述有关资料，回答下列问题：根据《企业会计准则——建造合同》，东方造船厂签订的该项建造合同属于( )。A.成本加成合同B.固定造价合同C.分期收款合同D.2001年6月25日后才可判断