5-3 三、20、On every piece of the paper ( ) pictures of some fish .写出原因have has 选一个,并写出原因

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5-3 三、20、On every piece of the paper ( ) pictures of some fish .写出原因have has 选一个,并写出原因

5-3 三、20、On every piece of the paper ( ) pictures of some fish .写出原因have has 选一个,并写出原因
5-3 三、20、On every piece of the paper ( ) pictures of some fish .
写出原因
have has 选一个,并写出原因

5-3 三、20、On every piece of the paper ( ) pictures of some fish .写出原因have has 选一个,并写出原因
are
这是倒装句,原句是:Pictures of fish are on every piece of the paper,主语是pictures,复数,表语是are on every piece of the paper.

5-3 三、20、On every piece of the paper ( ) pictures of some fish .写出原因have has 选一个,并写出原因 matlab信号处理 程序哪里出错?clear;clc;fs=500;t=0:1/fs:1-1/fs;TempSignal=20*exp(-t/0.03)+20*sin(100*pi*t+(pi/3))+12*sin(200*pi*t+(pi/2))+10*sin(300*pi*t+(pi/6))+6*sin(400*pi*t+(pi/8))+5*sin(500*pi*t+(pi/5)); %[s] = tfd(TempSignal,DecomNum); 怪pi三声 matlab多条图形绘制,我用hold on和plot(t,y1,t,y2...)也不行,为什么呢总是只有两条clear all;clc;close all; t=-2:0.001:2;y1=tan(pi/8)*t;y2=tan(2*pi/8)*t;y3=tan(3*pi/8)*t;y4=tan(4*pi/8)*t;y5=tan(5*pi/8)*t;y6=tan(6*pi/8)*t;y7=tan(7*pi/8 下列区间中,是函数y=xcosx-sina的单调递增区间为A.(pi /2,3pi/2)B.(pi,2pi)C.(3pi/2,5pi /2)D.(2pi ,3pi) sin(PI/2+a)=-4/5 a属于(Pi,3pi/2)则cos(Pi/3-a)为 化简sin(2x-pi)sin[x+(3/2)pi]/cos[x+(5/2)pi][1-sin(pi+x)] Error:Unexpected MATLAB operator.clear all;t=[pi/2:pi/5:5*pi/2];ti=[pi/2:pi/20:5*pi/2];d=[0.209 0.157 0.055 0.009 -0.187 -0.251 -0.192 -0.017 0.060 0.118 0.209];di=-0.0005245*ti.^8+0.01996*ti.^7-0.3211*ti.^6+2.84*ti.^5-15.05*ti.^4+48.81*ti.^3-94.34*t pi分之三是什么数 (全题)已知sin(α+3pi/4)=5/13,cos(pi/4-β)=3/5,且-4/pi小于α小于pi/4,pi/4小于β小于3pi/4,求cos2(α-β)? 已知cosa=3/5,且a属于(3pi/2,2pi),则cos(a-pi/3)= log((sin(5))^2)-3+pi=? 求 log((sin(5))^2)-3+pi a,b∈(3pi/4,pi),sin(a+b)=-3/5,sin(b-pi/4)=12/13,则cos(a+pi/4)= 已知a,b,属于(3pi/4,pi),sin(a+b)=-3/5,sin(b-pi/4)=12/13,则cos(a+pi/4)=? matlab的solve用法定义syms x y a1 a2equ1=1/120 - ((2*a2)/81 + (pi*a1)/12 + pi^2*(a2/405 + 1/12) + (pi^3*a1)/120)/pi^4equ2=-(a2/128 + (2*pi*a1)/81 + pi^2*(a2/960 + 2/81) + (pi^3*a1)/405 - pi^4/405)/pi^5输入solve('方程1', '方程2', 'a1', 'a1') 已知sin(a+pi/3)=4/5且pi/6 已知cos(pi/4+x)=3/5,17pi/12