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10V 的直流电压加在-一个10 uF的电容两端,则流过电容的电流等于_____ A 。
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放大器的输入电阻越大,表明放大器获取输入电压的能力越_____
一个十六选一的数据选择器,其地址输入端有( )
若要将方波电压变换为尖脉冲电压,则可采用由运放构成的_____电路实现。
电路如下图所示,则二极管D1、D2的状态为( )
在电阻性负载单相半波整流电路中,如果输出电流平均值是IO(AV),则二极管中的电流平均值为( )
三端集成稳压器7905的输出电压为_____V 。
两个一位二进制数A和B的数据比较器,表示A>B的输出G表达式为( )
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若要求集成稳压器输出电压为-5V,最大输出电流为1.5A.则可选用的集成稳压器是
单相桥式整流电容滤波电路中,设变压器副边电压有效值为10V,若滤波电容和某个二极管同时开路,则负载电阻上电压为()
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第三部分:概括段落大意和补全句子(第16~25题,每题1分。共10分)阅读下面短文,请完成短文后的2项测试任务:(1)从第16~20题后所给的6个选项中为第①~⑤段每段选择l个正确的小标题;(2)从第21~25题后所给的6个选项中选择5个正确选项。分别完成每个句子。
2.
19、蘧面能产生强烈明暗对比的光线是
3.
27.下列关于白盒测试的叙述中,正确的是
4.
5.
It is known to all that men women are different in many aspects. They have different values, priorities habits. They play by different rules. Some fundamental differences between men women are biological. 1.Women have more frequent interaction between their brain’s left right hemispheres(半球), which accounts for women’s ability to have better verbal skills intuition(直觉). Men have greater brain hemisphere separation, which explains their skills for abstract reasoning visual-spatial(视觉空间) intelligence. 2.Because of this, a poet describes women’s brains as a “superhighway” of connection compares men’s brains to a “little crooked(弯曲的) country road”. Different habits of men women are explained by different roles in the process of evolution. 3.Although life conditions have changed, both men women tend to follow their biological program. 4.Men tend to retain a firm sense of direction, which helps them trace the game, catch it, find the way home. Women have a better peripheral vision(周边视觉) that helps them to see what’s happening around the house to spot an approaching danger. Men’s brains are programmed to hunting, which explains their narrow range vision, while women’s brains are able to decipher(解释,破译) a wider range of information. When entering a room, men look for exits, estimating a possible threat, ways of escape, while women pay attention to the hosts’ face to find out who they are how they feel. 5.Men prefer strident(刺耳的) noise, hard handshakes, red color. They are better at solving technical problems. Women have a sharper ear, larger vocabulary. They use more words while talking.(20分)
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