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【简答题】
选词填空(用单词前的字母填空,如ABCD) A) archaeology B) fragment C) decipher D) alternatively E) authenticity F) fallacy G) unhesitatingly H) democracy I) might J) lamentable K) shabby L) offensive M) onset N) trench O) destiny It is truly 1) that people nowadays don't know enough about ancient civilizations. In the Western world, the cultures of ancient Greece and Rome gave rise to the popular idea of 2) that is central to many modern governments. Democratic governments sometimes are derided as a(n) 3) in today's world – many people don't feel as if they truly have a meaningful voice. However, there were cities (particularly in Greece) where the democratic ideal was born and every citizen truly had a powerful voice. Remarkably, we know this is the case because many documents have survived. Historians can verify their 4) by dating the paper, so we can 5) declare that they are legitimate. Linguists are able to 6) the ancient languages used in the documents, and we are therefore able to benefit from the wisdom inscribed on those pages. In addition, researchers can use 7) to uncover the physical remains of ancient villages. We have discovered that homes were a uniform size and most people lived as relative equals. I find it truly 8) to hear people say that there's nothing we can learn from history. Even if only a small 9) of the wisdom of ancient Greece survived until today, we would be better off. Indeed, it is an amazing thing to realize that our 10) as a people, our future, depends on our knowledge and understanding of our past. A) archaeology B) fragment C) decipher D) alternatively E) authenticity F) fallacy G) unhesitatingly H) democracy I) might J) lamentable K) shabby L) offensive M) onset N) trench O) destiny
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参考答案:
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【单选题】车站技术作业图表中调机动态代号待命的符号是()。
A.
Q
B.
D
C.
B
D.
S
【单选题】“够赫蒙”在壮话中是指
A.
我爱你
B.
我给你
C.
我恨你
D.
我想你
【简答题】在下列电路中,使用电阻来起到保护LED电路,LED端电压降为2.2V,我们通常将流经LED的电流限制为20mA。那么该电阻的阻值最小为____欧姆。
【判断题】对于三向等压应力状态,按第一、第二强度理论时,它不可能产生破坏。
A.
正确
B.
错误
【单选题】电阻器在 LED 电源线中的作用是什么
A.
电阻器总是与 LED 并联连接且限制电压。
B.
电阻器限制电流并防止 LED 损坏
C.
电阻器用于减少车载电气系统中的耗电量
【单选题】1 已知 发光二极管采用电阻限流电路,电源 U cc =5V , LED 正向压降 U led =2V ,要求电流 I=2mA ,试计算限流电阻 R 。
A.
2k Ω
B.
1.5k Ω
C.
3k Ω
D.
7.5k Ω
【单选题】25岁男性患者发现肉眼血尿,则其1L尿中含血:( )
A.
≥1ml
B.
0.5ml
C.
≥2ml
D.
≥3ml
E.
以上都不是
【简答题】某电路需要安装LED电源指示灯,电源电压是交流220V,请选择LED 的限流电阻的阻值。
【单选题】质量是指一组固有特性满足要求的( )
A.
水平
B.
程度
C.
满意度
D.
适用度
【单选题】相关信源无失真信息编码的充要条件不包括______。
A.
R 1 >H(S 1 |S 2 )    
B.
R 2 >H(S 2 |S 1 )
C.
R 1 >I(S 1 ;S 2 )    
D.
R 1 +R 2 >H(S 1 S 2 )
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