题干

某同学为探究漂浮在水面上的物体受到的浮力大小是否遵从阿基米德原理的结论,他进行了如图所示的实验。实验中所用弹簧测力计的一个黑格或一个白格均表示0.5牛。请回答下列问题:

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同类题3

阅读下面的文言文,完成下面小题。

    彭鹏,字奋斯,福建莆田人。幼慧,有与其父仇,欲杀鹏,走匿得免。顺治十七年,举乡试。耿精忠叛,迫就伪职,鹏阳狂示疾,椎齿出血,坚拒不从。事平,谒选,康熙二十三年,授三河知县。三河当冲要,旗、民杂居,号难治。鹏拊循惩劝,不畏强御。有妄称御前放鹰者,至县索饩牵,鹏察其诈,絷而鞭之。治狱,摘发如神。邻县有疑狱,檄鹏往鞫,辄白其冤。二十七年,圣祖巡畿甸召问鹏居官及拒精忠伪命状赐帑金三百谕曰知尔清正不受民钱以此养尔廉胜民间数万多矣!

    三十三年,疏劾顺天乡试中式举人李仙湄闱墨删改过多,杨文铎文谬妄,给事中马士芳磨勘①通贿。下九卿等察议,以鹏奏涉虚,因摘疏语有“臣言如妄,请劈臣头,半悬国门,半悬顺天府学”,以为狂妄不敬,应夺官。命鹏回奏,鹏疏言:“会议诸臣,徇试官徐倬、彭殿元欺饰,反以臣为妄,乞赐罪斥。”上不问,而予倬、殿元休致

    是年,顺天学政侍郎李光地丁内忧,上命在任守制,光地乞假九月。鹏劾光地贪恋禄位,不请终制,应将光地解任,留京守制,上从之。会廷臣集议,鹏追论杨文铎文谬妄,与廷臣忿争,事闻,命解职,以原品效力江南河工。三十六年,召授刑科给事中。三十七年,出为贵州按察使。

    广东因借兵饷,改额赋征银为征米,较估报时值浮多,户部屡饬追完。鹏至官,是年岁稔米价低,以米计银少七万三千有奇,疏请令经管各官扣追存库,并议嗣后额赋仍依原则征银,采购兵米;其按年应追完之银,实因丰歉不同,米价无定,乞免重追:诏允行。鹏视事勤敏,遇墨吏纠劾无少徇。岁旱,步祷日中,诣狱虑囚,开仓平粜,旋得雨。民大称颂。四十三年,卒官,年六十八,上深悼惜,称其勤劳,赐祭葬。寻祀广东名宦。

(摘编自《清史稿·彭鵬传》)

【注】①磨勘:唐内外文武官员考课,由本司及本州府长官按规定考核其功过行能,分九等写入考状,由吏部与各道观察使复验,任期满后,根据考绩结果升降。为防止申报不实与升降不当,须经吏部和各道观察使予以复验。磨勘之名始于此时。宋置审官院主持官员考课升迁,并确定磨勘名称。请沿用此法。

同类题4

任务型阅读

    We eat in our cars, at our desks, on the go, and in front of the TV. We eat take-out, packaged and prepared meals. Why? Because it fits our not-enough-time-in-the-day lifestyles____ Well, I'm certainly not the first one to think it—or say it—but we all need to slow down.

    Consumer trends around the globe show that over the past three decades people are purchasing more prepared foods at the grocery and eating out more than ever before. It's predicted that we'll spend more at restaurants in the coming years____However, we're getting less healthy.

    While debates can be seen indifferent media over the food industry's contribution to our growing waistlines and our health problems, the bottom line is this____We can choose to eat a fast-food lunch on the go. We can throw a frozen meal in the microwave and call it dinner. We can eat without thinking, in front of the tube, at our computers, and while driving a car.

    ____Studies have shown meaningful links between family meals and kids' mental and physical well-being. Eating sensibly doesn't take much time or money, but it does require you to make a conscious decision to do so. Wrapped in endless work, appointments and social activities, we often fail to enjoy a relaxing meal with our families.

    While it can be a challenge to always put healthy eating first, just do your best. Remember that the food you eat has a more significant impact on your health, weight and well-being than almost any other activity you do.____ Every meal made at home—even just once or twice a week—is a step closer to a healthier body and as lower food lifestyle.

A. Our food matches our lives.

B. Treat it with the importance that it deserves, but start small.

C. We're consuming an increasing number of calories.

D. Lunch is the biggest calorie intake when it comes to eating out.

E. Purchase food locally and skip as many packaged items as you can.

F. What we eat, where we eat and how we eat are all under our control.

G. We can devote an hour of the day to enjoying a meal with our families.