问题
单项选择题
为了达到辐射防护目的，辐射防护必须遵守的基本原则是（）。
A、实践的正当化
B、辐射防护的最优化
C、对个人剂量的限值
D、以上都是
答案
参考答案：D
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为了达到辐射防护目的，辐射防护必须遵守的基本原则是（）。
A、实践的正当化
B、辐射防护的最优化
C、对个人剂量的限值
D、以上都是
参考答案：D
| 2005年4月7日甲与乙签订货物买卖合同，合同约定甲向乙购买皮装9000套，并向乙预付货款30万元。合同中还约定：“凡因执行本合同所发生的一切争议，提交北京仲裁委员会根据该会的仲裁规则进行仲裁，仲裁裁决是终局的，对双方都有约束力。”2005年4月8日，甲将预付款30万元汇入乙的账户，但是乙在收到预付货款30万元后未向甲提供皮装，甲多次要求乙退还预付货款，乙一直未还。2006年3月9日，乙分立为丙、丁两公司。2006年5月11日，甲向北京仲裁委员会提出仲裁申请。2006年5月13日北京仲裁委员会受理了此案，并于2006年6月4日组成仲裁庭。在案件的审理过程中，甲对本案仲裁员的公正性和独立性产生怀疑，要求仲裁员回避，仲裁委员会作出不予回避的决定。并于2006年10月9日作出裁决。裁决作出后，被申请人向人民法院申请撤销仲裁裁决。 |
甲可以以( )为被申请人提出仲裁申请。
A．乙
B．丙
C．丁
D．丙、丁
The findings come ___36___ a study of nearly 1,000 US people that looked at diet, calorie intake and body mass index (BMI) - a measure of obesity.___37___ is found that those who ate chocolate a few times a week were, on ___38___, slimmer than those ___39___ ate it occasionally. Even though chocolate is loaded with calories, it contains ingredients（材料）that may favour weight loss ___40___ than fat synthesis, scientists believe.___41___ boosting calorie intake, regular chocolate consumption was related to lower BMI in the study, ___42___ is published in Archives of Internal Medicine. The link remained even when other factors, like how ___43___ exercise individuals did, were taken into ___44___.And it appears it is how often you eat chocolate that is important, rather than how much of it you eat. The ___45___ found no link with quantity consumed. ___46___ to the researchers, there is only one chance in a hundred that their findings could be explained by chance alone. Lead author Dr Beatrice Golomb, from the University of California at San Diego, said: "Our findings appear to add to a body of information suggesting that the composition of calories, not just the number of them, matters for determining their ultimate impact on weight."This is not the first time scientists ___47___ that chocolate may be healthy for us. Other studies have claimed chocolate may be good for the heart. Consumption of certain types of chocolate has been linked to some favourable changes in blood pressure, insulin（胰岛素）sensitivity and cholesterol（胆固醇）level. And chocolate, ___48___ dark chocolate, does contain antioxidants（抗氧化剂）which can help to mop up harmful free radicals - unstable chemicals that can damage our cells. Dr Golomb and her team believe that antioxidant compounds, called catechins（儿茶素）, can improve lean muscle mass and reduce weight ___49___ studies in rodents would suggest this might be so. Mice ___50___ for 15 days with epicatechin (present in dark chocolate) had improved exercise performance and observable changes to their muscle composition.They say clinical trials are now needed in humans to see ___51___ this is the case. But before you reach ___52___ a chocolate bar, there are still lots of unanswered questions. And in the absence of conclusive evidence, experts advise caution.While there's no harm in allowing yourself a treat like ___53___ now and again, eating too much might be harmful because it often ___54___ a lot of sugar and fat too.And if you are looking to change your diet, you are ___55___ to benefit most from eating more fresh fruits and vegetables.
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