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【单选题】
When permits for the discharge of chemicals into a waterway are issued, they are issued in terms of the number of pounds of each chemical that can be discharged into the waterway per day. These figures, calculated separately for each chemical for which a permit is issued, are based on an estimate of the effect of the dilution of the chemical by the amount of water flowing through the waterway. The waterway is therefore protected against being adversely affected by chemicals discharged under the permits. The argument depends on the assumption thatA.
relatively harmless chemicals do not interact with each other in the water to form. harmful compounds.
B.
there is a swift flow of water in the waterway that ensures rapid dispersion of chemicals discharged.
C.
there are no chemicals for which discharge into waterways is entirely prohibited.
D.
those who receive the permits do not always discharge the entire quantity of chemicals that the permits allow.
E.
the danger of chemical pollution of waterways is to be e-valuated in terms of human health only and not in terms of the health of both human beings and wildlife.
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【单选题】在正常心脏，兴奋传导的顺序是
A.
窦房结→房室交界→心房肌→心室肌
B.
窦房结→房室交界→心室肌→浦肯野纤维网→心房肌
C.
窦房结→心房肌→心室肌→浦肯野纤维网→心室肌
D.
窦房结→心房肌→房室交界→房室束和左右束支→浦肯野纤维网→心室肌
【单选题】下列说法不对的是?
A.
矿石是指在现有的技术经济条件下，能从中提取金属或有用矿物的岩石。
B.
脉石是指组成矿石的矿物中不含金属元素的岩石。
C.
焦炭即是木炭。
D.
软化性是指矿石开始变形时的温度和从开始变形到终了时的温度区间的大小。
【多选题】张三与李四之间存在债权债务关系,张三应当支付给李四人民币 400 万元, 2013 年 12 月张三签发一张银行承兑汇票给李四,承兑人为鸿发银行,付款日期为 2014 年 11 月 3 日,但由于疏忽的将汇票金额填写成人民币 560 万元, 2014 年 11 月 3 日,马六(李四的被背书人)向鸿发银行提示汇票请求付款,鸿发银行称,张三和李四之间只有 400 万元的债权债务关系,自己的承兑也只是...
A.
这张票据无效，金额填写错误
B.
这张汇票的金额是560万元
C.
鸿发只承担400万元的票据责任，因为实际债权债务关系就是400万元
D.
马六可以向张三、李四、鸿发银行行使追索权
E.
马六向李四行使追索权后，李四取得票据权利，李四向鸿发银行行使追索权，鸿发银行以实际债权债务只有400万元进行抗辩，这个抗辩理由不成立
F.
马六向李四行使追索权后，李四取得票据权利，李四向张三行使追索权，张三有权以实际债权债务只有400万元进行抗辩
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