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第一部分选择题(共40分)一、选择题 (本题共10小题,1～8小题是所有考生都必须作答的必做题,A、B 两组的9、10小题是选做题,考生只能选其中的一组作答。每小题4分,共40分。在每小题给出的四个选项中,有的小题只有一个正确选项,有的小题有多个正确选项。全部选对的得4分,选不全的得2分,有错选或不答的得0分)(一)必做题1.美国科研人员研制一种新型镍铜长效电池,它采用半衰期长达100年的放射性同位素镍63(_(28)~(63)Ni)
The first part of the multiple-choice questions (a total of 40 points) First, multiple-choice questions (this question a total of 10 small questions, 1 to 8 small questions are must-do questions for all candidates must answer, A, B two groups of 9 and 10 questions are selected to do Questions, candidates can only select one of the groups to answer each question 4 points, a total of 40. Among the four options given in each question, some questions have only one correct option, and some questions have multiple The correct option: 4 points for all selections, 2 points for incomplete selections, and 0 points for incorrect selections or non-responses.) (1) Must-do questions 1. U.S. researchers develop a new nickel-copper long-life battery, It uses radioactive isotope 63 with half-life up to 100 years (_(28)~(63)Ni)