题目:
假如利率是12%,刘小姐想在9年后获得1000元,她需要在今天拿出( )元钱进行投资。
A.300
B.361
C.410
D.423
答案:
参考答案:B
解析:
根据多期的现值公式:PV=FV/(1+r)T=1000/(1+12%)9≈361(元)。
假如利率是12%,刘小姐想在9年后获得1000元,她需要在今天拿出( )元钱进行投资。
A.300
B.361
C.410
D.423
参考答案:B
解析:
根据多期的现值公式:PV=FV/(1+r)T=1000/(1+12%)9≈361(元)。
肾实质性急性肾衰竭最常见的原因是()
A.急性肾小管坏死
B.急性肾间质病变
C.急性肾小球病变
D.急性肾血管病变
E.以上都是
感染性心内膜炎主要的病原微生物是()
A.草绿色链球菌和金黄色葡萄球菌
B.链球菌和肠球菌
C.肺炎球菌和淋球菌
D.流感杆菌和链球菌
E.葡萄球菌和流感杆菌
ISO22000:2005对食品安全小组的专业要求包括()
A、食品生产工艺
B、食品营养与卫生
C、食品质量保证
D、食品微生物学
[A] However, the production of TG is controlled by an enzyme that is, in turn, encoded by a gene called UGT2B17. This gene comes in two varieties, one of which has a part missing and therefore does not work properly. A person may thus have none, one or two working copies of UGT2B17, since he inherits one copy from each parent. Dr Schulze guessed that different numbers of working copies would produce different test results. She therefore gave healthy male volunteers whose genes had been examined a single 360mg shot of testosterone (the standard dose for legitimate medical use) and checked their urine to see whether the shot could be detected.
[B] Dr Schulze also says there is substantial ethnic variation in UGT2B17 genotypes. Two-thirds of Asians have no functional copies of the gene (which means they have a naturally low ratio of TG to EG), compared with under a tenth of Caucasians--something the anti-doping bodies may wish to take into account.
[C] The test usually employed for testosterone abuse relies on measuring the ratio of two chemicals found in the urine, testosterone glucuronide (TG) and epitestosterone glucuronide (EG). The former is produced when testosterone is broken down, while the latter is unrelated to testosterone metabolism, and can thus serve as a reference point for the test. Any ratio above four of the former to one of the latter is, according to official Olympic policy, considered suspicious and leads to more tests.
[D] The result was remarkable. Nearly half of the men who carried no functional copies of UGT2B17 would have gone undetected in the standard doping test. By contrast, 14% of those with two functional copies of the gene were over the detection threshold before they had even received an injection. The researchers estimate this would give a false-positive testing rate of 9% in a random population of young men.
[E] The agencies have had remarkable success. Testing for anabolic steroids (in other words, artificial testosterone) was introduced in the 1970s, and the incidence of cheating seems to have fallen dramatically as a result (see chart). The tests, however, are not foolproof. And a study just published in the Journal of Clinical Endocrinology & Metabolism by Jenny Jakobsson Schulze and her colleagues at the Karolinska Institute in Sweden suggests that an individual’s genetic make-up could confound them in two different ways. One genotype, to use the jargon, may allow athletes who use anabolic steroids to escape detection altogether. Another may actually be convicting the innocent.
[F] Cheating in sport is as old as sport itself. The athletes of ancient Greece used potions to fortify themselves before a contest, and their modern counterparts have everything from anabolic steroids and growth hormones to doses of extra red blood cells with which to invigorate their bodies. These days, however, such stimulants are frowned on, and those athletes must therefore run the gauntlet of organisations such as the World Anti-Doping Agency, which would rather they competed without resorting to them.
[G] In the meantime, Dr Schulze’ s study does seem to offer innocents a way of defending themselves. Athletes travelling to Beijing for the Olympic games later this year may be wise to travel armed not only with courage and the "spirit of Olympianism", but also with a copy of their genetic profile, just in case.
Order:
44()
进行抗震设计、施工及材料选择时,应遵守下列一些要求:()。
A.选择对抗震有利的场地、地基和基础
B.构件节点的强度不应低于其连接构件的强度
C.选择对抗震有利的建筑平面和立面
D.构件节点的强度不应高于其连接构件的强度
E.预埋件的锚固强度不应低于被连接件的强度