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【单选题】
和小电流放电相比,大电流放电时,电池的电压下降( )。
A.
较快
B.
较慢
C.
相同
D.
不确定
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参考答案:
举一反三
【单选题】With an increase in world food production, people in Africa and Latin America today eat more food than they did a decade ago.
A.
Y
B.
N
C.
NG
【单选题】One of the most interesting paradoxes in America today is that Harvard University, the oldest institution of higher learning in the United States, is now engaged in a serious debate about what a unive...
A.
fight against militarism.
B.
take an active part in solving society’s evils.
C.
support old and established institutions.
D.
involve themselves in politics.
【判断题】Today Wyoming produces more coal than any state in America.
A.
正确
B.
错误
【单选题】No other holiday that is today widely observed in North America bas such a long and curious history as Thanksgiving. Throughout the Bible, there are references to the Israelites setting apart days for...
A.
the Bible records Israelites' celebration of Thanksgiving Day
B.
Thanksgiving Day originated from England
C.
people in England did not observe Thanksgiving Day until the reformation
D.
February 27, 1872 was the first Thanksgiving Day ever celebrated in the world
【单选题】用( )编写的程序计算机能直接识别和执行。
A.
C语言
B.
机器语言
C.
汇编语言
D.
高级语言
【单选题】One of the most interesting paradoxes in America today is that Harvard University, the oldest institution of higher learning in the United States, is now engaged in a serious debate about what a unive...
A.
fight against militarism
B.
take an active part in solving society' s evils
C.
support old and established institutions
D.
involve themselves in politics
【单选题】下列叙述中正确的是( )。
A.
计算机能直接识别并执行用高级程序语言编写的程序
B.
用机器语言编写的程序可读性最差
C.
机器语言就是汇编语言
D.
高级语言的编译系统是应用程序
【单选题】下列叙述中,正确的是
A.
用高级程序语言编写的程序称为源程序
B.
计算机能直接识别并执行用汇编语言编写的程序
C.
机器语言编写的程序必须经过编译和连接后才能执行
D.
机器语言编写的程序具有良好的可移植性
【单选题】电压或电流同时叠加在信号的正负两端所产生的信号为共模信号,这种信号一般表现为噪声,抑制这种噪声可以采用差分放大器,这是因为差分放大器对共模信号()。
A.
起衰减作用
B.
稍微放大
C.
没有放大
D.
缓冲作用
【简答题】抑制共模噪声可以采用_____________电路,其输入阻抗越高,抑制能力越_______。
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