题干

08年4月,美国《科学》杂志发表“新超导体将中国物理学家推到最前沿”的评述。这表明,在新超导体研究领域,我国取得了令人瞩目的成就。假如人们已研制处常温下的超导体,则可以用它制作()


A:家用保险丝

B:白炽灯泡的灯丝

C:电炉的电阻丝

D:远距离输电导线

上一题 下一题 0.0难度 选择题 更新时间:2019-12-21 03:49:50

答案(点此获取答案解析)

D

同类题1

阅读下面的文言文,完成下面小题。

(一)

金谷诗序

石崇

    余以元康六年,从太仆卿出为使持节监青、徐诸军事、征虏将军。有别庐在河南县界金谷涧中,或高或下,有清泉茂林,众果、竹、柏、药草之属,莫不毕备。又有水碓、鱼池、土窟,其为娱目欢心之物备矣。时征西大将军祭酒王诩当还长安,余与众贤共送往涧中,昼夜游宴,屡迁其坐,或登高临下,或列坐水滨.时琴、瑟、笙、筑,合载车中,道路并作;及住,令与鼓吹递奏。遂各赋诗以叙中怀,或不能者,罚酒三斗。感性命之不永,惧凋落之无期,故具列时人官号、姓名、年纪,又写诗著后。后之好事者,其览之哉!

(二)

石崇传(节选)

    崇字季伦,少敏惠,勇而有谋。苞(西晋开国元勋石苞,石崇父)临终,分财物与诸子,独不及崇。其母为言,苞曰:“此兒虽小,后自能得。”年二十余,为修武令,有能名。

    崇颖悟有才气,而任侠无行检。在荆州,劫远使商客,致富不赀。征为大司农,以征书未至擅去官免。顷之,拜太仆,出为征虏将军,假节、监徐州诸军事,镇下邳。崇有别馆在河阳之金谷,一名梓泽,送者倾都,帐饮于此焉。至镇,与徐州刺史高诞争酒相侮,为军司所奏,免官。复拜卫尉,与潘岳谄事贾谧。谧与之亲善,号曰“二十四友”。广城君(晋贾充妻郭槐,司马衷即位后,封为“广城君”)每出,崇降车路左,望尘而拜,其卑佞如此。及贾谥诛,崇以党与免官。时赵王伦专权,崇甥欧阳建与伦有隙。崇有妓曰绿珠,美而艳,善吹笛。孙秀使人求之。崇时在金谷别馆,方登凉台,临清流,妇人侍侧。使者以告。崇尽出其婢妾数十人以示之,皆蕴兰麝,被罗觳,曰:“在所择。”使者曰:“君侯服御丽则丽矣,然本受命指索绿珠,不识孰是?”崇勃然曰:“绿珠吾所爱,不可得也。”使者曰:“君侯博古通今,察远照迩,愿加三思。”崇曰:“不然。”使者出而又反,崇竟不许。秀怒,乃劝伦诛崇、建。崇、建亦潜知其计,乃与黄门郎潘岳阴劝淮南王允、齐王囧以图伦、秀。秀觉之,遂矫诏收崇及潘岳、欧阳建等。崇正宴于楼上,介士到门。崇谓绿

    珠曰:“我今为尔得罪。”绿珠泣曰:“当效死于官前。”因自投于楼下而死。崇曰:“吾不过流徙交、广耳。”及车载诣东市,崇乃叹曰:“奴辈利吾家财。”收者答日:“知财致害,何不早散之?”崇不能答。崇母兄妻子无少长皆被害,死者十五人,崇时年五十二。

(《晋书·石崇传》)

同类题2

阅读下面短文,从下面每小题的A、B、C、D四个选项中选出最佳选项,并在答题卡将相应的字母编号涂黑。    

    Students at a primary school in Fuzhou, Hast China's Fujian Province were required to clean the school toilets to help them develop good habits. But some parents are strongly against the idea. They can't see the advantages of students doing such chores (杂亊). They think that the school should provide students with a proper education, not the chance to be school cleaners.

    In fact, parents, schools and society play an equally (同等地)important role in developing the character of students. It is good for schools to give students such tasks, because few of the students will do them at home. Their parents want them to do homework only.

    In recent years, some parents will make mountains out of molehills when students are asked to do some chores in schools. Some complain about the teachers if their kids get hurt in schools; some even challenge the schools' teaching methods and management. As a result, many primary schools, especially those in big cities, do not let students join in outdoor activities during breaks, fearing that they might get hurt. This is bad for the development of students' best qualities.

    What the primary school in Fuzhou is doing is worth praising. Doing chores can put a sense of responsibility into students' minds and teach them the spirit of rules as well as teamwork. Also, it can make students' in﹣school experiences more meaningful.