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【简答题】
设 是某非线性方程组的增广矩阵，则当a、b的取值满足______时，方程组有唯一解；______时方程组无解；______时，有解且通解中含有1个任意参数；______时，有解且通解中含有2个任意参数.
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举一反三
【单选题】According to the text, which of the following is true?
A.
Scientists can tell the motion of the earth from the motions of five other planets.
B.
A fixed star refers to a star that is always stationary on the sky.
C.
Ancient people had scant knowledge about the movement of the stars.
D.
All the stars on the sky can be seen all year long.
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【单选题】Which of the following is true about the motion of the moon?
A.
The moon and the sun are moving in the same place.
B.
The moon revolved along the ecliptic.
C.
The moon moves faster than the sun.
D.
The position of the moon can be found changed in an hour’s time.
查看完整题目与答案
【单选题】What do they use the blogs for?
A.
Handing in their writing assignents
B.
Debating controversial issues
C.
Exchang information and opinions
D.
Educating people to protect wildlife
查看完整题目与答案
【单选题】When the machines run the planet, for what purpose do they use the humans?
A.
Manual labor
B.
Energy
C.
Experiments
D.
Karaoke
查看完整题目与答案
【判断题】尺寸界线必须由轮廓线引出
A.
正确
B.
错误
查看完整题目与答案
【单选题】What do they use the blogs for?
A.
Handing in their writing assignments.
B.
Debating controversial issues.
C.
Exchanging information and opinions.
D.
Educating people to protect wildlife.
查看完整题目与答案
【单选题】When the machines run the planet in the film The Matrix, for what purpose do they use the humans?
A.
Manual labor
B.
Energy
C.
Experiments
D.
Karaoke
查看完整题目与答案
【单选题】总供给曲线具有正斜率时，总需求曲线向右移动会增加（）。
A.
实际工资、就业量和实际产出
B.
价格水平、就业量和实际产出
C.
劳动生产率和实际产出
D.
劳动力需求、就业量和实际工资
查看完整题目与答案
【单选题】true motion
A.
相对矢量
B.
相对运动
C.
绝对运动
D.
绝对矢量
查看完整题目与答案
【单选题】What are students required to do before they use the new app?
A.
They should have a LinkedIn profile.
B.
They should swipe their credit cards.
C.
They should have a personal statement.
D.
They should upload a video of their biography.
查看完整题目与答案
相关题目：
【单选题】According to the text, which of the following is true?
A.
Scientists can tell the motion of the earth from the motions of five other planets.
B.
A fixed star refers to a star that is always stationary on the sky.
C.
Ancient people had scant knowledge about the movement of the stars.
D.
All the stars on the sky can be seen all year long.
查看完整题目与答案
【单选题】Which of the following is true about the motion of the moon?
A.
The moon and the sun are moving in the same place.
B.
The moon revolved along the ecliptic.
C.
The moon moves faster than the sun.
D.
The position of the moon can be found changed in an hour’s time.
查看完整题目与答案
【单选题】What do they use the blogs for?
A.
Handing in their writing assignents
B.
Debating controversial issues
C.
Exchang information and opinions
D.
Educating people to protect wildlife
查看完整题目与答案
【单选题】When the machines run the planet, for what purpose do they use the humans?
A.
Manual labor
B.
Energy
C.
Experiments
D.
Karaoke
查看完整题目与答案
【判断题】尺寸界线必须由轮廓线引出
A.
正确
B.
错误
查看完整题目与答案
【单选题】What do they use the blogs for?
A.
Handing in their writing assignments.
B.
Debating controversial issues.
C.
Exchanging information and opinions.
D.
Educating people to protect wildlife.
查看完整题目与答案
【单选题】When the machines run the planet in the film The Matrix, for what purpose do they use the humans?
A.
Manual labor
B.
Energy
C.
Experiments
D.
Karaoke
查看完整题目与答案
【单选题】总供给曲线具有正斜率时，总需求曲线向右移动会增加（）。
A.
实际工资、就业量和实际产出
B.
价格水平、就业量和实际产出
C.
劳动生产率和实际产出
D.
劳动力需求、就业量和实际工资
查看完整题目与答案
【单选题】true motion
A.
相对矢量
B.
相对运动
C.
绝对运动
D.
绝对矢量
查看完整题目与答案
【单选题】What are students required to do before they use the new app?
A.
They should have a LinkedIn profile.
B.
They should swipe their credit cards.
C.
They should have a personal statement.
D.
They should upload a video of their biography.
查看完整题目与答案