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Direction : There are 20 blanks in the following passage. For each blank there are four choices marked A, B, C, and D. Choose the one that best fi ts into the passage. College life is one of the most important periods for any individual. It is during this stage that new opportunities _6_ , your body of knowledge is broadened and your futures are _7_ . You should make the best of the chance to try to _8_ the bene fi ts of going to college. In college, sharing differences with students from various backgrounds will be a(n) _9_experience to you, and it can lay the _10_ for greater understanding of different routines, lifestyles, and customs. You will _11_ a chance of making lifelong friends and help each other handle stress _12_ to the change from home to college. Besides, college life will _13_ you to educational experiences — attending different courses and joining student organizations. You can make the _14_ of resources on campus, such as sports facilities, _15_ libraries, and study centers. Taking part in different kinds of educational activities will _16 good effects. What is _17_ important is to plan your future occupation early. Those who have planned it _18_ will enjoy an advantage over others as they may take the _19_ possible time to get used to the job market. _20_ a variety of courses fi rst before deciding on what job you want to _21_ . Take advice from your teachers or friends _22_ you are ready to make the decision. The new experiences and the new people you come across will make your college life more _23_ . Let me take the opportunity to _24_ you of this once more: Campus life is a(n) _25_ experience unlike any other. Therefore, you should take full advantage of it before you get out into the world.
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【单选题】一硅稳压管稳压电路如图所示。其中未经稳压的直流输入电压 V I =18V , R=1k Ω , R L =2k Ω ,硅稳压管 D Z 的稳定电压 V Z =10V ,动态电阻及未被击穿时的反向电流均可忽略。试求 V O 的值。
A.
18V
B.
10V
C.
0V
D.
12V
【单选题】一硅稳压管稳压电路如图所示。其中未经稳压的直流输入电压VI=18V,R=1kΩ,RL=2kΩ,硅稳压管DZ的稳定电压VZ=10V,动态电阻及未被击穿时的反向电流均可忽略。试求RL值降低到多大时,电路的输出电压将不再稳定。【图片】
A.
2k Ω
B.
2.5k Ω
C.
3k Ω
D.
1.25k Ω
【单选题】下列计算重置成本的方法中,计算结果必然属于复原重置成本的是()
A.
重置核算法
B.
物价指数法
C.
功能价值法
D.
规模经济效益指数法
【单选题】一硅稳压管稳压电路如图所示。其中未经稳压的直流输入电压VI=18V,R=1kΩ,RL=2kΩ,硅稳压管DZ的稳定电压VZ=10V,动态电阻及未被击穿时的反向电流均可忽略。试求VO的值。【图片】
A.
18V
B.
10V
C.
0V
D.
12V
【单选题】下列计算重置成本的方法中,计算结果必然属于复原重置成本的是( )。
A.
重置核算法
B.
物价指数法
C.
功能价值类比法
D.
统计分析法
【单选题】2011年中央经济工作会议首次把扩大内需作为“战略基点”,突出强调通过保障和改善民生强化内需市场。在经济工作中,将扩大内需作为战略基点() ①是形成合理收入分配格局的制度保证 ②是加快转变经济发展方式的基本要求 ③有利于发挥消费在社会再生产中的纽带作用 ④有利于不断改善和提高人民生活水平和质量
A.
①②
B.
①③
C.
②④
D.
③④
【单选题】一硅稳压管稳压电路如图所示。其中未经稳压的直流输入电压 V I =18V , R=1k Ω , R L =2k Ω ,硅稳压管 D Z 的稳定电压 V Z =10V ,动态电阻及未被击穿时的反向电流均可忽略。试求 I Z 的值.
A.
8mA
B.
3mA
C.
5mA
D.
0mA
【单选题】下列计算重置成本的方法中,计算结果必然属于复原重置成的是()。
A.
重置核算法
B.
功能价值法
C.
物价指数法
D.
规模经济效益指数法
【单选题】一硅稳压管稳压电路如图所示。其中未经稳压的直流输入电压VI=18V,R=1kΩ,RL=2kΩ,硅稳压管DZ的稳定电压VZ=10V,动态电阻及未被击穿时的反向电流均可忽略。试求IR的值。【图片】
A.
8mA
B.
3mA
C.
5mA
D.
0mA
【单选题】一硅稳压管稳压电路如图所示。其中未经稳压的直流输入电压VI=18V,R=1kΩ,RL=2kΩ,硅稳压管DZ的稳定电压VZ=10V,动态电阻及未被击穿时的反向电流均可忽略。试求IZ的值。【图片】
A.
8mA
B.
3mA
C.
5mA
D.
0mA
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