题干

某同学将两节新干电池接在如图所示的电路中,并用电压表测开关的电压.当开关断开时,电压表示数约为____V;当开关闭合时,电压表示数约为____V.

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同类题1

阅读《义田记》,完成第后面的题。
      范文正公,苏人也。平生好施与,择其亲而贫、疏而贤者,咸施之。
      方贵显时,置负郭常稔之田千亩,号曰“义田”,以养济群族之人。日有食,岁有衣,嫁娶凶葬皆有赡。择族之长而贤者主其计,而时共出纳焉。日食,人一升;岁衣,人一缣;嫁女者五十千,再嫁者三十千;娶妇者三十千;再娶者十五千;葬者如再嫁之数,葬幼者十千。族之聚者九十口,岁入给稻八百斛。以其所入,给其所聚,沛然有馀而无穷。屏而家居俟代者与焉,仕而居官者罢莫给。此其大较也。
      初,公之未贵显也,尝有志于是矣,而力未逮者二十年。既而为西帅,及参大政,于是始有禄赐之人,而终其志。公既殁,后世子孙修其业,承其志,如公之存也。公虽位充禄厚而贫终其身。殁之日,身无以为敛,子无以为丧。惟以施贫活族之义,遗其子而已。
注释:①范文正公:范仲淹,字希文,卒谥文正。②负郭:靠近城郭。负,背倚。③常稔rěn 之田:常熟之田,良田。稔,庄稼成熟。④缣jiān :细密之绢。⑤千:一千钱为一贯。⑥斛hú :古代量器,以十斗为一斛。⑦沛然:充裕的样子。⑧屏:指罢官或离职。⑨参大政:指导范仲淹任枢密副使、参知政事。⑩修其业:指主持义田之事。

同类题5

    America is a mobile society. Friendships between Americans can be close and real, yet disappear soon. They don't feel hurt. If the same two people meet again, even years later, they pick up the friendship. This can be quite difficult for us Chinese to understand .Friendships between us develop more slowly but may become lifelong feelings, extending(延伸)deeply into both families.
T    here is another difficult point for us to understand. Although Americans treat friends warmly in their personal everyday lives, they don't show their politeness to them if it requires a great deal of time. But in China, we are usually generous with our time. We, as hosts, will appear at an airport even in the middle of the night to meet a friend. We may take a day off from our work to act as guides to our friends. It is opposite in America. Americans cannot manage the time to do a great deal with a visitor outside their daily plans. They will probably expect the visitors to get themselves from the airport to the hotels. And they expect the visitors will phone them from there. Once the visitors arrive at their homes, the welcome will be full, warm and real.
    For Americans, it is often considered more friendly to invite a friend to their homes than to restaurants, except for business matters. Americans are ready to receive us foreigners at their homes, share their holidays, and their home life. So accept their hospitality(好客)at home and enjoy your visit in America!