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【简答题】
、共射基本电路电压放大倍数为负值,说明输出信号与输入信号相位相差____。
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【单选题】To find the middle of an N-period moving average, we use:
A.
(N+1)/2, rounding up to the closest integer if N is even.
B.
(N-1)/2, rounding up to the closest integer if N is even.
C.
(N-2)/2, rounding up to the closest integer if N is even.
D.
(N+2)/2, rounding up to the closest integer if N is even.
【单选题】Don’t use your cellphone — we are flying at ____ altitude of 10,000 meters and ____average speech is 678km/h.
A.
an; the
B.
the; the
C.
the; an
D.
an; an
【简答题】A．It will rise an average of 1 foot. B．It will be worn down an average of 1 foot. C．It will be worn down to sea level. D．It will lose 730 million tons of solid matter.
【简答题】What is the average (arithmetic mean) of x and y? (1) The average of x+3 and y+5 is 14. (2) The average of x, y, and 16 is 12.
【简答题】We use an average of 158 liters of water a day in Britain, for which we pay a bargain price of 28p a liter, but much of this is just cash down the drain, according to water companies. Most are campaig...
【简答题】Use the average of 1995 and 2000 as the base and determine indexes for 2000
【单选题】On average, users use about ________ apps a month on their smartphone.
A.
10
B.
15
C.
20
D.
50
【单选题】下面程序是求两个数的平均数,试找出其中的错误 #include void main() {float average; average=1/2*(96+55); printf(“the average=%f\n”,average); }
A.
float average;
B.
average=1/2*(96+55);
C.
printf(“the average=%f\n”,average);
D.
void main()
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