单选题表现出“精力旺盛，表里如一，刚强，易感情用事”特征的气质类型是()。

单选题在Powerpoint2000中，不能将正在编辑的演示文稿另存为（）类型的文件。

单选题每年的12月29日是国际生物多样性日。1992年6月在巴西里约热内卢举行的联合国环境与发展大会上，多个国家签署了《保护生物多样性公约》，这是全球第一个关于保护和可持续利用生物多样性的公约。1993年12月29日该公约正式生效，这一天就被定为国际生物多样性日。下图为我国生物资源面临的问题。据此回答问题。

单选题1837年.两广水师副将韩肇庆结托外人.以巡船援助鸦片走私，再将外商赠予的鸦片作为走私没收品上报邀功，结果朝廷赐其顶戴花翎。这表明（　　）。

单选题古人云：“少而好学，如日出之阳；壮而好学，如日中之光；老而好学，如炳烛之明。”近日西方教育家断言：“不提高就死亡。”这对我们的启示是( )。

单选题眼睛的位置在自头顶至______底部1/2处。 A.鼻底 B.发际 C.口裂 D.颏下

单选题卢梭主张教育的目的是培养自由的人。这种观点属于()。

单选题因创作弦乐四重奏《风.雅.颂》(1983年)而获得国际韦伯室内乐作曲比赛二等奖的我国“新潮音乐”作曲家是( )。

单选题杂种雄蛙的一个体细胞经有丝分裂形成两个子细胞(C 1 、C 2 )，一个初级精母细胞经减数第一次分裂形成两个次级精母细胞(S 1 、S 2 )。比较C 1 与C 2 、S 1 与S 2 细胞核中DNA数目及其贮存的遗传信息，正确的是( )。

单选题______是教师与教师之间良好沟通的基础。 A.少争多让，善于倾听 B.容忍异己，理解宽容 C.坦诚相对，赞美欣赏 D.巧用语言，珍惜情谊

单选题Drunken driving, sometimes called America"s socially accepted form of murder, has become a national epidemic. Every hour of every day about three Americans on average are killed by drunken drivers, adding up an incredible 350,000 over the past decade. A drunken driver is usually defined as one with a 0.10 blood alcohol content or roughly three beers, glasses of wine or shots of whisky drunk within two hours. Heavy drinking used to be an acceptable part of the American alcohol image and judges were lenient in most courts, but the drunken slaughter has recently caused so many well-publicized tragedies, especially involving young children, that public opinion is no longer so tolerant. Twenty states have raised the legal drinking age to 21, reversing a trend in the 1960s to reduce it to 18. After New Jersey lowered it to 18, the number of people killed by 18 to 20-year-old drivers more than doubled, so the state recently upped it back to 21. Reformers, however, fear raising the drinking age will have little effect unless accompanied by educational programs to help young people to develop "responsible attitudes" about drinking and teach them to resist peer pressure to drink. Tough new laws have led to increased arrests and in many areas already, to a marked decline in fatalities. Some states are also penalizing bars for serving customers too many drinks. As the fatalities continue to occur daily in every state, some Americans are even beginning to speak well of the 13 years" national prohibition of alcohol that began in 1919, which President Hoover called the "noble experiment". They forget that legal prohibition didn"t stop drinking, but encouraged political corruption and organized crime. As with the booming drug trade generally, there is no easy solution.

单选题物理学中有些结论不一定要通过计算才能验证，有时只需通过一定的分析就能判断结论是否正确。根据流体力学知识，喷气式飞机喷出气体的速度v与飞机发动机燃烧室内气体的压强p、气体密度ρ及外界大气压强p0有关。试分析判断下列关于喷出气体的速度的倒数的表达式正确的是()。

单选题看到与自己水平差不多的人考上大学，就会增强自己考上大学的信心。这种自我效能感源自______。 A.个体自己成功和失败的经验 B.替代性经验 C.言语说服 D.情绪唤起

单选题随着年龄增长，幼儿形象记忆与语词记忆的差别会()。

单选题教学《装在套子里的人》，教师将“掌握契诃夫的生平事迹”作为知识与能力的教学目标之一。下面对该教学目标的分析不正确的是( )。

单选题苛勒认为学习是通过下列哪个过程实现的？( )

单选题班集体首先是一个社会，它是()。

单选题1987版电视连续剧《红楼梦》的插曲《枉凝眉》《红豆曲》《葬花吟》等，风格各异而又主题鲜明。这些作品的曲作者是()

单选题设三次多项式函数f(χ)＝aχ3＋bχ2＋cχ＋d满足f(t)dt＝12χ2＋18χ＋1，则f(χ)的极大值点为()。

单选题下图是“一带一路”示意图，读图完成问题。