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【简答题】
电路如图所示,试分析当Ui=3V时, 哪些二极管导通?当 Ui=0V 时,哪些二极管导通?(写出分析过程并设二极管正向压降为0.7V )。
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【单选题】This selection suggests that child abuse is____.
A.
a growing problem whose causes are not fully understood
B.
caused primarily by the mental illness of parents
C.
a problem in the United States,but a greater one in Europe
D.
easily determined because of recent public laws
【简答题】各种思想体系由于对经济基础的关系不同和反映社会存在的方式不同，又可以分为两类。一类是属于______范围的思想体系，包括政治思想、法律思想、道德、宗教、艺术、哲学和绝大部分社会科学。它们是上层建筑的重要组成部分，从不同的侧面、以不同的方式反映特定的经济基础并为之服务，在阶级社会里具有一定的阶级性。另一类是属于______范围的思想体系，包括自然科学、语言学、逻辑学等，它们不是特定经济基础的反映，不...
【简答题】在Word中,具有强大的文档保护功能,可以做到隔一定时间自动保存当前文档、可以一次保存所有打开的文件、可以设置()密码、 可以用不同的名称或不同的位置保存文档和可以用多种格式保存文件。
【单选题】Flexibility, assertiveness, problem solving, and ______ are also valued.
A.
announcements
B.
friendliness
C.
dishonesty
D.
a bad attitude
【单选题】People do not analyze every problem they meet. Sometimes they try to remember a solution from the last time they had a similar problem. They often accept the opinions or ideas of other people. Other t...
A.
Six Stages for Repairing Sam's Bicycle.
B.
Possible Ways to Problem-solving.
C.
Necessities of Problem Analysis.
D.
Suggestions for Analyzing a Problem.
【单选题】People do not analyze every problem they meet. Sometimes they try to remember a solution from the last time they had a similar problem. They often accept the opinions or ideas of other people. Other t...
A.
Six Stages for Repairing Sam's Bicycle.
B.
Possible Ways to Problem-solving.
C.
Necessities of Problem Analysis.
D.
Suggestions for Analyzing a Problem.
【单选题】People do not analyze every problem they meet. Sometimes they try to remember a solution from the last time they had a similar problem. They often accept the opinions or ideas of other people. Other t...
A.
refer to others
B.
by accident
C.
consult teachers
D.
through experiments
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