题干

小组在探究“通电螺线管的外部磁场”实验中,设计了如图甲所示电路。


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同类题2

阅读下面的文言文,完成后面各题。

        陶侃字士行,本鄱阳人也。徙家庐江之寻阳。侃早孤贫,为县吏。庐江太守张夔召为督邮,有能名,迁主簿。夔妻有疾,将迎医于数百里。时正寒雪,诸纲纪皆难之,侃乃请行,众咸服其义。

        迁武昌太守,左转广州刺史。侃在州无事,辄朝运百甓于斋外,暮运于斋内。人问其故,答曰:“吾方致力中原,过尔优逸,恐不堪事。”其励志勤力,皆此类也。

        迁都督荆、雍、盖、梁州诸军事。侃性聪敏,勤于吏职。终日敛膝危坐阃外多事千绪万端罔有遗漏远近书疏莫不手答,笔翰如流,未尝壅滞。常语人曰:“大禹圣者,乃惜寸阴,至于众人,当惜分阴,岂可逸游荒醉,生无益于时,死无闻于后,是自弃也。”诸参佐或以谈戏废事者,乃命取其酒器、蒱博之具,悉投之于江,吏将则加鞭扑,曰:“樗蒱者,牧猪奴戏耳!老庄浮华,非先王之法言,不可行也。君子当正其衣冠,摄其威仪,何有乱头养望自谓宏达邪!”有奉馈者,皆问其所由。若力作所致,虽微必喜,慰赐参倍;若非理得之,则切厉呵辱,还其所馈。尝出游,见人持一把未熟稻,侃问:“用此何为?”人云:“行道所见,聊取之耳。”侃大怒曰:“汝既不田,而戏贼人稻!”执而鞭之。是以百姓勤于农殖,家给人足。

        【注】①纲纪:指管理一家事务的仆人。②甓(pì):砖。③阃(kǔn)外:统兵在外。④樗蒱(chūpú):中国古代的一种棋类游戏。⑤牧猪奴:指赌徒。⑥乱头养望:披头散发,故意做作以博取声名。

同类题3

阅读下面短文, 从短文后各题所给的四个选项(A、B、C、D)中, 选出可以填入空白处的最佳选项。

    That summer,Luke had been my closest companion for five years.We get lots of1in our area during the summer season.Many forests are badly2by fire each year.That hot summer,not far from our shelter,a forest3 fire.It was July,and there had been a heat wave going on for three days.Luke rushed toward the forest where the fire was sending out a4heat.There was no longer any hope at that moment to wait for Luke to come back to the5. In fact,I was waiting for firefighters to tell me that he had6in the forest.Suddenly,a fireman burst into my office and7me that my log Luke had succeeded in saving four kittens who had been8by the flames.According to the fireman,Luke seized the kittens,one by one moving them to a9place.

    I immediately10the fireman to the forest to pick up the rescued kittens.11we got to the scene of the incident,we saw that Luke was not there.Then we heard the12of a dog barking in the forest.I13the barks as Luke's.The fireman followed the14of the dog until they found him barking loudly by the side of an injured fireman who was lying on the ground and15waiting for rescue.

    Thanks to Luke,four kittens and a fireman were saved.That day,I was very proud of Luke for his two heroic 16.Luke showed much compassion(同情心)for both animals like him and for a human being who was trying to put out the fire with his colleagues.Truth to be told,my17was immeasurable.

    I paid a visit to the fireman in his house accompanied by my lovely Luke.What a18scene it was when the fireman hugged Luke tightly to his chest!"One thousand thanks,Luke,for saving my life,"the fireman said.

    This true story of love and compassion shows us that pets are loving,caring and compassionate.We should love and19them.Little animals can do20things for humans.