单选题口渴会促使人做出觅水的行为活动，这是动机中的______。 A.导向功能 B.激活功能 C.强化功能 D.调节与维持功能

单选题法国作家凡尔纳被称为“科幻小说之父”，他一生创作了60多部科幻作品。下列作品属于他创作的是()。

单选题以己度人，认为自己身上有什么特点别人也会有。这属于（　　）

单选题某学生是校篮球队的主力队员，但不能自觉遵守课堂纪律。老师在班会上请他向全班同学讲解篮球竞赛规则和遵守规则的重要性，然后组织全班同学以此为例，讨论如何自觉维护课堂教学秩序，促进该生发生了转变。这种做法体现了德育的______。 A.理论与实践相结合原则 B.疏导原则 C.教育影响一致性原则 D.个别教育原则

单选题Seventy years ago, more than 160,000 Allied troops stormed the beaches of Normandy during the D-Day invasion. And while we all know that day served as a huge turning point for the Allied cause, you probably haven"t thought much about what those soldiers carried with them to eat during and after the invasion. Food had to be lightweight, nutritious and very high in energy; after all, these men were about to invade Nazi-occupied land. As it happened, the one substance that could fulfill all those requirements was a very unlikely item—a Hershey"s chocolate bar. The Hershey chocolate company was approached back in 1937 about creating a specially designed bar just for U.S. Army emergency rations. According to Hershey"s chief chemist Sam Hinkle, the U.S. government had just four requests about their new chocolate bars: they had to weight 4 ounces, be high in energy, withstand high temperatures and "taste a little better than a boiled potato". The final product was called the "D ration bar", a blend of chocolate, sugar, cocoa butter, skim milk powder and oat flour. The viscous mixture proved too thick to move through the normal chocolate bar manufacturing set up at the Hershey plant, so initially each bar had to be packed into its 4-ounce mold by hand. As for taste, well, most who tried it said they would rather had eaten the boiled potato. The combination of fat and oat flour made the chocolate bar a dense brick, and the sugar did little to mask the overwhelmingly bitter taste to the dark chocolate. Since it was designed to withstand high temperatures, the bar was nearly impossible to bite into. Most men who ate it had to shave slices off with a knife before they could chew it. And despite the U.S Army"s best efforts to stop the men from doing so, some of the D ration bars ended up in the trash. Later in the war, Hershey introduced a new version, known as the Tropical bar, specially designed for extreme temperatures of the Pacific Theater. By the end of the war, the company had produced more than 3 billion ration bars. But "Hitler"s Secret Weapon", as many infantrymen referred to the chocolate bar, was hardly the only candy in the D-Day rations. Candy was an easy way to pep up the troops, and the quick burst of energy provided by sugar was a welcome addition to kit bags. Along with the D rations, troops received three days worth of K ration packs. These were devised more as meal replacements and not sustenance snacks like the D rations, and came completely with coffee, canned meats, processed cheese and tons of sugar. At various points during the war, men could find powdered orange or lemon drink, caramels, chewing gum and—of course—more chocolate. Along with packs of cigarettes and sugar cubes for coffee, the K ration packs provided plenty of valuable energy for fighting men.

单选题通过研究表明．快慢肌特征区分方法不正确的是______。 A.形态特征 B.代谢特征 C.生理特点 D.单个对比

单选题在我国近现代学制改革中，明确规定将学堂改为学校，实行男女教育平等，允许初等小学男女同校的学制是()。

单选题教学中，某教师组织学生分别代表生产商、经销商、消费者、营养专家，就食品添加剂主题发表观点。这种教学属于( )。

单选题(　 )强调学习过程是学生主动构建自己知识的过程，学生不是被动的信息接受者，而是信息意义的主动重构者。

单选题关于光电效应，下列说法正确的是______。 A.极限频率越大的金属材料逸出功越大 B.只要光照射的时间足够长，任何金属都能产生光电效应 C.从金属表面出来的光电子的最大初动能越大，这种金属的逸出功越小 D.入射光的光强一定时，频率越高，单位时间内逸出的光电子数就越多

单选题下列日常生活经常发生的事情中，不属于信息资源管理的是()。

单选题()是保证幼儿各方面健康发展的前提。

单选题某老师在教学中，组织学生开展了本地区存在的资源短缺问题的调查活动，让学生充分感受可持续发展的重要性和紧迫性。这种学习方法是______。

单选题下列选项中，与“王静和李跃是军人”的判断类型不同的是()。

单选题书店老板耿某向初中生小刘出售色情书刊，耿某这种做法违反了()。

单选题在“以人为本”的教育理念指导下，具体到教育实践中就是以（　　）

单选题婴儿看见物体时，先是移动肩肘，用整只手臂去接触物体，然后才会用腕和手指去接触并抓取物体，这是儿童动作发展中的______所致。 A.近远规律 B.大小规律 C.首尾规律 D.从整体到局部的规律

单选题Excel中，若要按某个字面对某些数据分类汇总，则需先按这个字段进行()。

单选题______ is concerned with the social significance of language variation and language use in different speech communities.

单选题北魏孝文帝改革的根本目的是()。