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Magic (魔法)often forces us not to believe our own eyes or even appears to be breaking the laws of physics or nature! The word “magic” has many different meanings. When a bird appears in a hat or when someone declares that he could see into the future—-both can be called magic When a sick person suddenly becomes well or a well person ( or even animal) becomes ill, magic is the cause The British author Terry Pratchett uses magic a great deal in his popular Discworld series of books. Magic has always been used for fun. People enjoy working out in which cup the little ball is or how he knows which card I was thinking of Harry Houdini was one of the first world-famous magicians—famous for escaping from deadly situations. Recently David Copperfield,or David Blane,has become very popular for his uunbelievable abilitiesJ,such as making the Statue of Liberty disappear or rise. Magical rings and three-headed dogs may not be real, but does this mean nothing magical really exists? Can you always explain how the magician has done the card trick? Maybe it is better not to explain,but to leave a little magic in our lives. Pick a card,any card. The author explains what magic is in paragraph 1 by___________. A.giving causes and effects B.using examples C.comparing a healthy person with a sick one D.listing the time of magical events Who is mentioned as a great escape artist?A.Harry Houdini B.David Blan C. D.David Copperfield E.Terry Pratchett. What does the author think of magic?A.It provides people with fun B.It changes our lives. C.It explains strange things in our lives D.It breaks the laws of physics.
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【单选题】红色糊精的分子量比无色糊精的分子量:
A.
B.
C.
相等 �
D.
不确定
【判断题】五停心观之一是不净观。
A.
正确
B.
错误
【单选题】有关周期矩形脉冲信号的傅里叶级数形式的频谱特点描述不正确的是()
A.
具有谐波性
B.
具有收敛性
C.
具有连续性
D.
具有离散性
【单选题】在傅里叶变换的四种具体形式中,( )的时域信号是离散非周期的,频谱是连续周期的。
A.
连续傅里叶变换
B.
连续傅里叶级数
C.
离散傅里叶变换
D.
离散傅里叶级数
【判断题】不净观是五停心观之一。
A.
正确
B.
错误
【单选题】在傅里叶变换的四种具体形式中,( )的时域信号是连续周期的,频谱是离散非周期的。
A.
连续傅里叶变换
B.
连续傅里叶级数
C.
离散傅里叶变换
D.
离散傅里叶级数
【简答题】A公司某项目部承建一供水扩建工程,工程主要内容为新建一座钢筋混凝土水池,长32m,宽4m,池体深6.5m,基坑与邻近建筑物距离2.6m,设计要求基坑用灌注桩作为围护结构,搅拌桩作止水帷幕。项目部编制了详细的施工组织设计,其中水池浇筑方案包含控制混凝 土入模温度,控制配合比和坍落度,内外温差控制在25℃以内。地层土为黏土,地下水位于地表水以下.5m。 项目部编制的施工组织设计按程序报批,A公司主...
【多选题】连续周期信号的傅里叶级数具有
A.
周期性
B.
离散型
C.
谐波性
D.
收敛性
【单选题】红色糊精的分子量比无色糊精的分子量:
A.
B.
C.
相同
D.
不确定
【单选题】有关周期矩形脉冲信号的傅里叶级数形式的频谱特点描述不正确的是
A.
具有离散性
B.
具有谐波性
C.
具有收敛性
D.
具有连续性
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