用多用电表欧姆挡测电阻时，下列说法中正确的是（   ）

在天津南开中学不仅有“允公允能，日新月异”八字校训，还有容止格言、四十字镜箴和“渤海之滨，白河之津，巍巍我南开精神。汲汲骎骎，月异日新，发煌我前途无垠。美哉大仁，智勇真纯，以铸以陶，文质彬彬。渤海之滨，白河之津，巍巍我南开精神!”的校歌。张伯苓在1917年学生毕业典礼上对学生讲演说： “今日正值诸生立志之时，无论各具何长，要皆能发扬昌大，以备国家干城之选……望各立而志，急图自新”，……“学校正如一小试验场，场内人皆有信心，具改造社会之能力，将来进入社会改造国家，必有成效”。此材料表明张伯苓办学思想中最看重的是

阅读理解
    Different weather makes people feel different．It influences health，intelligence and feelings．
    In August，it is very hot and wet in the south the US．People there have heart trouble and other kinds of health problems during this month．In the Northeast and the Middle West，it is very hot in the summer and very cold in the winter．People in these states have more heart trouble after the weather changes in February or March．
    The weather can also influence intelligence ． For example，in a 1983report by scientists，IQ(智商)of a group of students was very high when a very strong wind came, but after the strong wind,
    Their IQ was 10% lower than before. The wind can help people have higher intelligence. However,very hot weather can make it lower. Students in many schools of the US often get worse in exams(考试)in the hot months of the year(July and August).
    Weather also has a strong influence on people's feelings．Winter may be a bad time for thin people．They usually feel cold during these months．They might feel unhappy during cold weather．But fat people may have a hard time in hot summer．At about 18℃people become stronger．Low air pressure may make people forgetful．People leave more bags on buses and in shops on low-pressure days．
    Are you feeling sad，tired，forgetful，or unhappy today？It may be the weather's problem．

如图，AB是圆O的直径，弦BD，CA的延长线相交于点E，过E作BA的延长线的垂线，垂足为F．求证：AB²=BE•BD﹣AE•AC．

课外阅读。

                                                                             两只羊

      一天，一只白羊从南面上了独（dú）木桥，一只黑羊从北面上了独（dú）木桥。他们同时来到桥当中，白羊说：“你退（tuì）回去，让我先过桥！”黑羊说：“你退（tuì）回去，让我先过桥！”

      ​它们谁也不肯（kěn）让谁，就打了起来，不一会儿，只听到河里“扑通！扑通！”的响声，它们都掉到河里去了。