2021-2022学年七年级新目标英语周报第34期。答案

13.B根据电解池的工作原理可知,b、d电极均发生还原反应,为阴极,a、c电极为阳极,A正确。图乙中为氧离子导体,d电极上的电极反应为N2+6e+3H2O=2NH3+3,B错误。在电解池中H由阳极向阴极移动,C正确。根据原子守恒可知,a电极上的反应物应为H2,D正确。答案选B

这是一篇说明文,心理学家们将人们睡在陌生的床上通常无法入睡的现象称为“第一晚”效应,文章内容对睡眠环境和研究者的调查与结论进行阐述。2.D细节理解题。根据第二段第二句 The puzzle was what benefit would be gained from itwhen performance might be affected the following day. nn33.A细节理解题。根据第三段的第一句 To take a closer look, her team studied3 5 healthyeople as they slept in the unfamiliar environment of the university s Department ofPsychological Sciences可知34.C细节理解题。根据最后一段第一句 Curious if the left hemispheres were indeedremaining awake to process information detected in the surrounding environment, Dr. Sasakire-ran the experiment while presenting the sleeping as35.B推理判断题。根据最后一段第二句 She worked out that, if the left hemisphere wasstaying alert in a strange environment, then it would react to the irregular beeps by stirringpeople from sleep and would ignore the regularly timed ones. n]5nl

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