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【简答题】
Proudly reading my words, I glanced around the room, only to find my classmates with big smiles on their faces and tears in their eyes. Confused, I glanced toward my stone-faced teacher. Having no choice, I slowly raised the report I had worked on, hoping to hide myself. “What could be causing everyone to act this way?” Quickly, I flashed back to the day Miss Lancelot gave me the task. This was the first real task I received in my new school. It seemed simple: go on the Internet and find information about a man named George Washington. Since my idea of history came from an ancient teacher in my home country, I had never heard of that name before. As I searched for the name of this fellow, it became obvious that there were two people with the same name who looked completely different! One invented hundreds of uses for peanuts, while the other led army across America. I stared at the screen, wondering which one my teacher meant. I called my grandfather for a golden piece of advice: flip (掷) a coin. Heads—the commander, and tails—the peanuts guy. Ah! Tails, my report would be about the great man who invented peanut butter, George Washington Carver.Weeks later, standing before this unfriendly mass, I was totally lost. Oh well, I lowered the paper and sat down at my desk, burning to find out what I had done wrong. As a classmate began his report, it all became clear, “My report is on George Washington, the man who started the American Revolution.” The whole world became quiet! How could I know that she meant that George Washington? Obviously, my grade was terrible. Heartbroken but fearless, I decided to turn this around. I talked to Miss Lancelot, but she insisted: No re-dos; no new grade. I felt that the punishment was not justified, and I believed I deserved a second chance. At last, I worked very hard for the rest of the school year. Ten months later, that chance came as I found myself sitting in the headmaster’s office with my grandfather, now having a completely different conversation. I smiled and flashed back to the embarrassing moment at the beginning of the year as the headmaster informed me of my chance to skip the sixth grade. Justice is sweet! 小题1: What did the author’s classmates think about his report? A.Complex. B.Funny. C.Boring. D.Puzzling. 小题2: Why was the author confused about the task? A.He was unfamiliar with American history. B.He followed the advice and flipped a coin. C.He forgot his teacher’s instruction. D.He didn’t know why the teacher gave such a task. 小题3:In the end, the author turned things around _______. A.by redoing his task B.through his own efforts C.with the help of his grandfather D.under the guidance of his headmaster
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【单选题】以辉铜矿(Cu 2 S)为原料冶炼铜,其反应原理可表示为:Cu 2 S+O 2 高温 . 2Cu+SO 2 . 下列说法不正确的是(  )
A.
化合价发生变化的元素有3种
B.
Cu 2 S在该反应中既是氧化剂又是还原剂
C.
1 mol O 2 参加反应时,上述反应转移电子总物质的量为4 mol
D.
SO 2 被分离、回收后氧化生成SO 3 ,作为制取硫酸的原料
【单选题】2010年5月21日,美军_____的组建,标志着美军正向信息化高端领域转型。
A.
赛博司令部
B.
全球打击司令部
C.
核力量司令部
D.
中央司令部
【单选题】发热,测体温39.5°C伴有恶心、呕吐,下腹部不适,疑为“急性肾盂肾炎”,请问下列各项检查中对肾盂肾炎有诊断价值的是
A.
尿沉渣见白细胞
B.
尿沉渣见红细胞管型
C.
有尿路刺激征
D.
清洁中段尿细菌培养革兰阴性杆菌>105/ml
E.
肾浓缩功能减退
【单选题】患者女性,25岁,已婚,两周前上感发作,昨日晨起突发畏寒、发热,测体温39.5°C伴有恶心、呕吐,下腹部不适,疑为“急性肾盂肾炎”,请问下列各项检查中对肾盂肾炎有诊断价值的是
A.
尿沉渣见白细胞
B.
尿沉渣见红细胞管型
C.
有尿路刺激征
D.
清洁中段尿细菌培养革兰阴性杆菌>105/ml
E.
肾浓缩功能减退
【单选题】下述关于复功率说法不正确的是()
A.
复功率的实部与虚部分别为有功功率与无功功率
B.
复功率的模为视在功率
C.
复功率只能应用于二端网络
D.
二端网络复功率的幅角等于该网络的阻抗角
【单选题】吊顶工程施工前应进行防火或防锈处理的不是()。
A.
面板
B.
预埋件
C.
木饰面板
D.
型钢吊杆
【判断题】创新是有规律的,支持创新是要尊重规律的。( )
A.
正确
B.
错误
【单选题】下述说法中正确的是
A.
.物体中所有分子的动能和势能的总和,叫做物体的热力学能
B.
.物体热力学能的多少,可以用物体吸热或放热的多少来量度
C.
.物体对外做功,表明此物体具有的热力学能一定多
D.
.气体在温度不变时,体积膨胀,它的热力学能一定增加
【多选题】对三联苯是一种有机合成中间体,工业上合成对三联苯的化学方程式为3 Fe △ +2H 2 ↑.下列说法不正确的是(  )
A.
上述反应属于取代反应
B.
对三联苯分子中至少有16个原子共平面
C.
对三联苯的一氯取代物有4种
D.
0.2 mol对三联苯在足量的氧气中完全燃烧消耗5.1 mol O 2
【简答题】下图为甲、乙两物质的溶解度曲线,请据图回答下列的第1、2小题。 1.下列说法不正确的是 [     ] A.T1℃时,甲、乙两物质的溶解度相等 B.T2℃时,甲物质的溶解度大于乙物质的溶解度 C.要将甲从其浓溶液中析出,可采用冷却热饱和溶液或蒸发结晶的方法 D.T2℃时,将25g物质甲放入到50水中,充分溶解后得到的是T2℃甲物质的不饱和溶液 2.针对甲物质而言,下列关于溶解度曲线中A、B、C三点...
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