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【单选题】
PID控制器中,积分的作用是( )。
A.
响应速度加快,减少稳态误差,但不能完全消除稳态误差。
B.
消除稳态误差
C.
减小超调,克服振荡
D.
对系统没有作用
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【单选题】氧化镁含量( )是划分钙质石灰和镁质石灰的界限
A.
0.05
B.
0.1
C.
0.15
D.
0.2
【单选题】氧化镁含量( )是划分钙质石灰和镁质石灰的界限。
A.
5%
B.
10%
C.
15%
D.
20%
【多选题】下列叙述中说法正确的是
A.
若 ,则
B.
若 和 均为奇函数,则 为偶函数
C.
卷积法只适用于线性时不变系统
D.
级联系统的冲激激励响应与两个子系统联接的顺序无关
【单选题】Which one of the following will increase the value of a firm's net working capital?
A.
using cash to pay a supplier
B.
depreciating an asset
C.
collecting an accounts receivable
D.
purchasing inventory on credit
E.
selling inventory at a profit
【单选题】Which one of the following does not reduce a firm's net income?
A.
Income taxes
B.
Interest expense
C.
Dividends
D.
Depreciation expense
【单选题】新版塑料5英镑钞票在紫光灯下,钞票正面会显现出一个()相间的数字 “5” 。
A.
金银
B.
红绿
C.
红蓝
D.
蓝绿
【判断题】CMOS反相器的静态工作功耗约等于0
A.
正确
B.
错误
【单选题】The financial ratio measured as net income divided by sales is known as the firm's:
A.
profit margin
B.
return on asset
C.
retern on equity
D.
earnings before interest and taxes
【单选题】初心を忘れた___が、新鮮な気分や心意気が失われつつあることは否めない。
A.
わけだ
B.
次第だ
C.
わけではない
D.
次第ではない
【单选题】Which one of the following will increase the value of a firm's net working capital?
A.
using cash to pay a supplier
B.
collecting an accounts receivable
C.
purchasing inventory on credit
D.
selling inventory at a profit
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