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【单选题】
二极管电路如下图所示，判断图中二极管是导通还是截止后，可确定电路的输出电压Uo为______。(设二极管的导通压降0.7V )【图片】A.
5.7V
B.
-4.3V
C.
-5V
D.
-5.7V
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【简答题】国家普通话水平测试试卷( 3 ) 一、读单音节字词( 100 个音节,共 10 分,限时 3.5 分钟) 粉 坪 窝 赫 帕 矩 依 谎 坑 毕 娇 诊 寇 耳 屯 埂 弱 床 内 充 钛 槽 喘 松 扰 袜 融 北 寻 绑 十 点 瑟 吃 国 均 窜 压 最 丢 向 拟 坏 凝 聘 恩 丑 康 勺 字 痰 擦 俗 烫 陪 爹 按 元 磬 武 砌 鸟 穷 旅 决 卤 牵 稳 蓄 蕊 恰 款 胸 绺...
【判断题】采用同一系列的颜色来搭配服装重在显现和谐美。具体应用时要注意,同系色之间也要有等距离的深浅之分,要掌握好其分寸感,色彩过于相近,则层次不够分明;色彩相差太远,则有失协调。
A.
正确
B.
错误
【单选题】The bear pulled out his tail when ______.
A.
he felt a big fish touching his tail
B.
he felt he could not put up with the cold
C.
he thought he had enough fish for his supper
D.
he saw the fox run far away from him
【单选题】than he felt at first. He felt【C8】______light that he could not
A.
very
B.
so
C.
as
D.
too
【简答题】选择题、在下列各种情况下,应分别采用哪种类型(低通、高通、带通、带阻)的滤波电路。 (1)抑制50Hz交流电源的干扰; (2)处理具有1Hz固定频率的有用信号; (3)从输入信号中取出低于2kHz的信号; (4)抑制频率为100kHz以上的高频干扰。
【简答题】Unlike traditional lightin9，LEDs do not give out heat So___________．
【单选题】请根据短文的内容，回答题。 Weaving with Light In the Sierra Madre mountain range of west central Mexico, the native Huichol people live much the way their ancestors did--without electricity. That&39;s because it&3...
A.
it is too difficult for them to change their lifestyle
B.
they know nothing about it
C.
it costs too much to string power lines
D.
they don't need it
【单选题】( ) Is a self-supporting cross-border e-commerce platform.
A.
LightIn TheBox
B.
DHgate
C.
Amazon
D.
eBay
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