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【简答题】
如下图,试确定二极管D是正偏还是反偏?设二极管正偏时的正向压降为0.7V,试计算U X 和U Y 的值(共9分) (a) (b)
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【判断题】根据解码网络结构的不同,D/A转换器有多种类型,有电阻网络型、电容网络型、电阻电容混合型等。( )
A.
正确
B.
错误
【判断题】发展幼儿的基本动作可以通过体育游戏来完成
A.
正确
B.
错误
【单选题】It is very difficult to prove today that a painting done two or three hundred years ago, especially one without a signature or with a questionably authentic signature, is indubitably the work of this ...
A.
Art dealers have always been led by economic self-interest to attribute any unsigned paintings of merit to recognized masters rather than to obscure artists.
B.
When a painting is originally created, there are invariably at least some eyewitnesses who see the artist at work, and thus questions of correct attribution cannot arise at that time.
C.
There are not always clearly discernible differences between the occasional inferior work produced by a master and the very best work produced by a lesser talent.
D.
Attribution can shape perception inasmuch as certain features that would count as marks of greatness in a master's work would be counted as signs of inferior artistry if a work were attributed to a minor artist.
E.
Even though some masters had specialists assist them with certain detail work, such as depicting lace, the resulting works are properly attributed to the masters alone.
【简答题】• A prove that two plus two equals four is given on the first page.
【单选题】-How can you prove that you are not connected with the accident? -I have two______. [     ]
A.
judges
B.
friends
C.
witnesses
D.
facts
【简答题】Let A and B be any two s. Prove that
【单选题】EPIC conducted a research two years ago to______.
A.
prove that people should eat five portions of fruit a day
B.
find a way to reduce the overall cancer risk
C.
make sure the right amount of fruit eaten every day
D.
investigate the relation between eating fruit and reducing cancer risk
【简答题】A prove that two plus two equals four is given on the first page.
【单选题】 16 .下列关于勤劳节俭的论述中,正确的选项是( )。
A.
勤劳一定能使人致富
B.
勤劳节俭有利于企业持续发展
C.
新时代需要巧干,不需要勤劳
D.
新时代需要创造,不需要节俭
【多选题】创业过程中,企业需要分析不同融资渠道的优缺点,以便在适当的时机通过最为经济有效的融资渠道获得资金。企业的融资渠道包括( )。
A.
保险公司
B.
天使投资人
C.
风险投资家
D.
自我融资
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