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搜题/搜资源
【单选题】【消耗次数:1】
When you go to the doctor he asks you to describe your ____ so that he can make a diagnosis (诊断).
①
indications
②
signs
③
symbols
④
symptoms
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When you make a self-introduction, you can tell what you do for a ______________.
①
job
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life
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living
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taste
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He has left his book here on___, so that you can read it.
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purpose
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intention
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aim
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meaning
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25.If you explained the situation to your lawyer, he ______ able to advise you much better than I can.
①
will be
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was
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would be
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were
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【单选题】
When you read about your destination, you will learn more about the world and get ideas for places to visit and things to see. By ( ) prices and offers , you can also make your travel budget last longer.
①
compare
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compatible
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comparable
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comparing
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【单选题】
Could you make an appointment with Doctor Wilson for me?____________
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I cannot do it for you.
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Im afraid all the appointments are filled.
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You can have it.
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【单选题】
When he was a boy, he used to go there and watch ____.
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to repair bicycles
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bicycles to be repaired
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bicycles being repaired
④
repairing bicycles
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【单选题】
If you follow these steps below, youll know what is worth seeing and doing, so that you can ( ) your time at the museum.
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make a plan for
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make sure of
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When he was a boy,he used to go there and watch________.
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to repair bicycles
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bicycles to be repaired
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bicycles being repaired
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【单选题】
Can you go to the concert with us this evening?____________
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No, I already have plans.
②
I’d love to, but I’m busy tonight.
③
No, I really don’t like being with you.
④
I’m ill, so I shouldn’t go out.
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【单选题】
You can not see the doctor ____ you have made an appointment with him.?
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except ?
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even ?
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unless ?
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随机题目
【单选题】
设随机变量X,Y相互独立,且<img class=jc-formula data-tex=D(X)=12,D(Y)=16 src=https://huaweicloudobs.ahjxjy.cn/156D835F4C8A6E2AED82BCAA335FF621.png style=vertical-align: middle;/>,则<img class=jc-formula data-tex=D(2X-3Y)= src=https://huaweicloudobs.ahjxjy.cn/F67366E19AD2B4059957086B47984721.png style=vertical-align: middle;/>
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下列结论正确的是
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反对称矩阵主对角线上的元素全为零
②
对称矩阵主对角线上的元素必全为零
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对称阵一定不等于反对称阵
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【单选题】
对于矩阵A,B,C,下列结论正确的是( )
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若AB=AC,则B=C
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AB=BA恒成立
③
ABC=ACB
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A+B+C=B+A+C
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【单选题】
行列式<img class=jc-formula data-tex=\left| 1\quad 2\quad 2\quad 2\\ 2\quad 1\quad 2\quad 2\\ 2\quad 2\quad 1\quad 2\\ 2\quad 2\quad 2\quad 1 \right| =(\quad \quad \quad ) src=https://huaweicloudobs.ahjxjy.cn/D605D5D7063DF5A3E41F2F91D6BDF050.png style=vertical-align: middle;/>
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2
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1
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<img class=jc-formula data-tex=-7 src=https://huaweicloudobs.ahjxjy.cn/8B8FE081D9E71BC141D1C09D6B01FB11.png style=vertical-align: middle;/>
④
7
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【单选题】
矩阵<img class=jc-formula data-tex=\left[ 1\quad 1\quad 1\quad 1\\ 2\quad 2\quad 2\quad 2\\ 3\quad 3\quad 3\quad 3\\ 4\quad 4\quad 4\quad 4 \right] src=https://huaweicloudobs.ahjxjy.cn/08D5909372F7F6449CD1969479995EDB.png style=vertical-align: middle;/>的秩
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1
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2
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3
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4
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【单选题】
若线性方程组<img class=jc-formula data-tex=\left\{ 2{ x }_{ 1 }-{ x }_{ 2 }+{ x }_{ 3 }=0\\ { x }_{ 1 }+\lambda { x }_{ 2 }-{ x }_{ 3 }=0\\ \lambda { x }_{ 1 }+{ x }_{ 2 }+{ x }_{ 3 }=0 \right \\ src=https://huaweicloudobs.ahjxjy.cn/BAC3A3DF07424460CD8947E199AD8C49.png style=vertical-align: middle;/>有非零解,则<img class=jc-formula data-tex=\lambda src=https://huaweicloudobs.ahjxjy.cn/14C3B57DF5E84C1472D22AC460DC2BA0.png style=vertical-align: middle;/>满足的条件为( )
①
<img class=jc-formula data-tex=\lambda =4 src=https://huaweicloudobs.ahjxjy.cn/7518073AE313BDB678F829D3C7231BF8.png style=vertical-align: middle;/>
②
<img class=jc-formula data-tex=\lambda =-1 src=https://huaweicloudobs.ahjxjy.cn/E93BF30EF049FD40BC789FE2C4D1D47F.png style=vertical-align: middle;/>
③
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设x1和x2是齐次线性方程组Ax=0的解,则
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x1-x2是齐次线性方程组Ax=0的解。
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x1+x2是齐次线性方程组Ax=0的解。
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x1+2x2是齐次线性方程组Ax=0的解。
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在西周时,故意称为[填空1],过失称为[填空2]。
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中国古代律典中,被后人称为《唐律疏议》的是《[填空1] 》。
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