【判断题】【消耗次数：1】
非齐次线性方程组的两个解的和仍然是解.
①
正确
②
错误
参考答案：
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相关题目
【多选题】
设x1和x2是齐次线性方程组Ax=0的解，则
①
x1-x2是齐次线性方程组Ax=0的解。
②
x1+x2是齐次线性方程组Ax=0的解。
③
2x1-x2是齐次线性方程组Ax=0的解。
④
x1+2x2是齐次线性方程组Ax=0的解。
【多选题】
设x1和x2是非齐次线性方程组Ax=b的解，则
①
x1-x2是齐次线性方程组Ax=0的解。
②
x1+x2是非齐次线性方程组Ax=b的解。
③
x1-x2是非齐次线性方程组Ax=b的解，则
④
0.5x1+0.5x2是非齐次线性方程组Ax=b的解。
随机题目
【单选题】
3.Some of us would like to act the story ____ it isn’t finished yet.
①
but
②
and
③
though
④
so
【单选题】
10. I _______ trouble finding the place.
①
didn’t have many
②
haven’t a great deal of
③
didn’t have much
④
hadn’t a lot of
【单选题】
19.It is getting dark. Our teacher _______.
①
let us to go home
②
let us go home
③
let us go to home
④
let we go home
【单选题】
13.They are ______ young _____ carry the box onto the table.
①
enough; too
②
too, to
③
so; to
④
very; to
【单选题】
12.Which sentence is right?
①
I don’t think that he is not right.
②
I think he is not right.
③
I don’t think that he is right.
④
I think he was not right.
【单选题】
17. Pay attention please! ____ of you want to attend the party?
①
Who
②
Which
③
Whom
④
What
【单选题】
16.- ______ do you like the new play? - It’s good and interesting.
①
How
②
Which
③
What
④
Whom
【单选题】
18.- ______ did you sleep last night? - I stay up too late to go to sleep.
①
How
②
When
③
Why
④
Where
【单选题】
2. ______ he ______ I am a doctor.
①
Both; and
②
Either; nor
③
Neither; nor
④
Neither; and