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【简答题】
如图所示,甲、乙分别是“探究平面镜成像特点”和“探究凸透镜成像规律”的实验装置. (1)在利用甲图“探究平面镜成像特点”的实验中,用玻璃板代替平面镜进行实验,是利用了玻璃板的 (填物理属性的名称),从而能便于确定 的位置; (2)下面表格中的数据是一位同学测量的四组像和物体到玻璃板的距离,实验中刻度尺的使用以及读数均正确.但是分析数据时发现第二组的数据有较大的偏差,你认为造成这个偏差的原因可能是 . A.选用的玻璃板太厚 B.选用的玻璃板太薄 C.在判断蜡烛B与蜡烛A的像是否完全重合时出现了较大偏差3636+ 实验序号 1 2 3 4 物到玻璃板的距离/cm 15.30 23.02 25.60 28.50 像到玻璃板的距离/cm 15.30 23.15 25.60 28.50 (3)在利用装置做“验证凸透镜成实像规律”的实验时,把蜡烛离凸透镜90cm移动到120cm时,发现像几乎在离凸透镜5cm的地方,他判断凸透镜的焦距是_______cm,理由是:__________________________________.接着他把凸透镜放在如图示A位置时,光屏应向M点的______(左/右)侧移动,接收到一个清晰的像;若固定光屏的位置于M点不动,要使光屏上得到一个清晰的像,他应把蜡烛向A点的______(左/右)侧移动,当蜡烛移动到如图示B点时,无论怎样移动光屏都不能在光屏上得到的像,这时,通过透镜向同侧观察,能看到放大的虚像,若把蜡烛放到B点______(左/右)侧,可以使虚像更大.
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【简答题】A.The beginning of deaf education in the U.S. B.The history of education for children with disabilities in France. C.Special education began in the 20th century. D.The history and development of educa...
【单选题】下列有关资产组减值测试的说法中,正确的是( )。
A.
在可确定单项资产可收回金额和资产组可收回金额的情况下,应该按照资产组计提减值
B.
资产组是指企业可以认定的最小资产组合,其产生的现金流入应当基本上独立于其他资产或资产组
C.
资产组的可收回金额应当按照该资产组的账面价值减去处置费用后的净额与其预计未来现金流量的现值两者之间较高者确定
D.
资产组减值损失金额应当直接冲减资产组内的各项可辨认资产的账面价值
【简答题】任务型阅读 At the beginning of the twentieth century, many people thought that the American family was falling apart. A century later, we know that this was not the case. However, although the family is st...
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【单选题】注射上牙槽后神经时突然颊部肿胀、张口受限,其原因是
A.
药物注入翼内肌
B.
药液注入咬肌
C.
血肿
D.
咀嚼肌痉挛
E.
感染
【单选题】听力原文:W: Mr. Black is fluent in Spanish and now he's beginning to study Arabic. M: He also knows a few words in Japanese and Chinese. Q: Which language does Mr. Black speak well? (3)
A.
Spanish.
B.
Japanese.
C.
Arabian.
D.
Chinese.
【单选题】__________, he had no money, but later he became quite rich.
A.
To begin with
B.
Beginning with
C.
Begin with
D.
Begun with
【单选题】注射上牙槽后神经时突然颊部肿胀、张口受限,其原因是( )
A.
药物注入翼内肌
B.
药物注入翼咬肌
C.
血肿
D.
咀嚼肌痉挛
E.
感染
【简答题】完形填空 。 Although it was autumn, the snow was already beginning to fall in Tibet (). Our legs were so heavy and cold that 1 felt like big pieces of ice. Have you 2 seen snowmen ride bicylces? That's w...
【单选题】听力原文:M:Nr.Black is fluent in Spanish and now he's beginning to study Arabic. W:He also knows a few words in Japanese and Chinese. Q: Which language does Mr.Black speak well? (14)
A.
Japanese.
B.
Arabic.
C.
Spanish.
D.
Chinese.
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