1.I want ( ) stay at home.2.Fish ( ) fly in the sky.3.Doctors often help the sick people in the ( ）4.Mike kicks a good time.He is very ( )5.look at the traffic light.It is ( ).Let us go3X+2Y+Z=392X+3Y+2Z=4002X+Y+3Z=336解得X=60 Y=84 Z=443X+2Y+Z=39

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1.I want ( ) stay at home.2.Fish ( ) fly in the sky.3.Doctors often help the sick people in the ( ）4.Mike kicks a good time.He is very ( )5.look at the traffic light.It is ( ).Let us go3X+2Y+Z=392X+3Y+2Z=4002X+Y+3Z=336解得X=60 Y=84 Z=443X+2Y+Z=39
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1.I want ( ) stay at home.2.Fish ( ) fly in the sky.3.Doctors often help the sick people in the ( ）4.Mike kicks a good time.He is very ( )5.look at the traffic light.It is ( ).Let us go3X+2Y+Z=392X+3Y+2Z=4002X+Y+3Z=336解得X=60 Y=84 Z=443X+2Y+Z=39
1.I want ( ) stay at home.
2.Fish ( ) fly in the sky.
3.Doctors often help the sick people in the ( ）
4.Mike kicks a good time.He is very ( )
5.look at the traffic light.It is ( ).Let us go
3X+2Y+Z=392
X+3Y+2Z=400
2X+Y+3Z=336
解得X=60 Y=84 Z=44
3X+2Y+Z=392
X+3Y+2Z=400
2X+Y+3Z=336
最后解得X=60 Y=84 Z=44

1.I want ( ) stay at home.2.Fish ( ) fly in the sky.3.Doctors often help the sick people in the ( ）4.Mike kicks a good time.He is very ( )5.look at the traffic light.It is ( ).Let us go3X+2Y+Z=392X+3Y+2Z=4002X+Y+3Z=336解得X=60 Y=84 Z=443X+2Y+Z=39
1）I want ( to ) stay at home.[want to do sth.]
2)Fish ( can't ) fly in the sky.
3)Doctors often help the sick people in the ( hospital ）．
4)Mike kicks a good time.He is very ( happy )．
5）look at the traffic light.It is ( green ).Let us go．
3X+2Y+Z=392①
X+3Y+2Z=400②
2X+Y+3Z=336③
由②×3得：3X+9Y+6Z=1200④
由④－①得：7Y+5Z=808⑤
由②＋③得：3X+4Y+5Z=736⑥
由⑥－①得：2Y+4Z=344⑦
把⑤和⑦重新组成方程组得：7Y+5Z=808⑤
2Y+4Z=344⑦
解之得：Y=84
Z=44
把Y=84,Z=44代入①得：X=60
∴原方程组的解为：X=60
Y=84
Z=44

1.I want ( to ) stay at home.
2.Fish ( can't ) fly in the sky.
3.Doctors often help the sick people in the ( hospital ）
4.Mike kicks a good time. He is very ( happy )
5.look at the traffic light. It is ( green ). Let us go
3X+2Y+Z=392
X+3Y+2Z=400
2X+Y+3Z=336
解得X=60 Y=84 Z=44

1,to
2,doesn't
3,hospital
4,busy
5,bright
2式*2-3式
5y+z=464 （4）
2式+3式-1式
2y+4z=344 即是
y+2z=172 (5)
4式-5式*5
9z=396 (6)
z=44
y=84
x=60

1.I want ( to ) stay at home.
2.Fish ( can't ) fly in the sky.
3.Doctors often help the sick people in the ( hospital ）
4.Mike kicks a good time. He is very ( happy )
5.look at the ...

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1.I want ( to ) stay at home.
2.Fish ( can't ) fly in the sky.
3.Doctors often help the sick people in the ( hospital ）
4.Mike kicks a good time. He is very ( happy )
5.look at the traffic light. It is ( green ). Let us go
===============================
数学题
3X+2Y+Z=392
X+3Y+2Z=400
2X+Y+3Z=336
解得X=60 Y=84 Z=44
解答正确。

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