如图所示，电源电动势为E，内阻为r。电路中的R2、R3分别为总阻值_爱下问搜题

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问题选择题

如图所示，电源电动势为E，内阻为r。电路中的R₂、R₃分别为总阻值一定的滑动变阻器，R₀为定值电阻，R₁为光敏电阻（其电阻随光照强度增大而减小）。当电键S闭合时，电容器中一带电微粒恰好处于静止状态。有关下列说法中正确的是

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A.只逐渐增大R₁的光照强度，电阻R₀消耗的电功率变大，电阻R₃中有向上的电流

B.只调节电阻R₃的滑动端P₂向上端移动时，电源消耗的功率变大，电阻R₃中有向上的电流

C.只调节电阻R₂的滑动端P₁向下端移动时，电压表示数变大，带电微粒向下运动

D.若断开电键S，电容器所带电荷量变大，带电微粒向上运动

答案

答案：A

完形填空

English was always my favorite subject. In my freshman year of high school, I could write a killer composition. In my second year, my 36 allowed me to give spelling tests to the class. I had wonderful 37 of my junior year. Mrs. Alexander 38 me to sit at her desk and take over the class when she had to leave the room. Only my senior English class was 39 , as we had a teacher right out of college who expected college-level work. Every student received a “C” or “D” grade the first quarter. 40 English was still my subject.
I graduated from high school, 41 early and had children. Confident about my English, I often helped my kids with their English homework. And I 42 long articles and beautiful poetry as a columnist for a newspaper. Fifteen years later, I went to college, and because I had been an "A" student, I remained an ‘‘A” student. I 43 up to my own expectations.
Yesterday, I 44 my high school report cards when I was reading old papers. That bundle of report cards 45 back the old days. I remembered sitting in my advisor's office，explaining that I had always excelled at English, and 46 that I did not deserve a “D” from that 47 teacher of my senior year. The advisor was sympathetic but unable to change a (an) 48
Reading 49 my old report cards revealed something else too. I wanted to tore them or hide them. I was not an ‘‘A” student in high school English！Somehow, I had 50 myself of this，when the grades clearly reflected an 51 student with an occasional “ A ” or ‘‘ B” but mostly “C” s.
Had I lived up to those grades and 52 myself according to those letters，I would have never confidently sought my writing 53 . Had I believed in my early grades instead of myself，I would have allowed my fear of 54 to defeat my enthusiasm and damage my creativity. 55 ，I viewed my younger self as an “A” English student, except for that undeserved “D”.

A．impressions

C．inspirations

C．disappointing

D．controversial

B．guaranteeing

C．complaining

D．recommending

C．inexperienced

D．independent

B．enthusiastic

C．outstanding

选择题

第二次世界大战后，资本主义世界货币金融体系建立，作为国际主要支付手段的货币是[ ]

A．卢布

B．英镑

C．欧元

D．美元