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搜题/搜资源
【单选题】【消耗次数:1】
The Bakers arrived last night. If they’d only let us know earlier,______at the airport.
①
we’d meet them
②
we’ll meet them
③
we’d have met them
④
we’ve met them
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They know the sport inside out, and we treat them with the respect they ______.
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deserve
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inspect
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encounter
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undermine
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【单选题】
As a freshman, we should get to know campus ( ) as soon as possible and make good use of them.
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Source
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sources
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resource
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resources
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【单选题】
---I think we’ve met somewhere before.---No, _________.
①
it isn’t likely
②
it can’t be true
③
I would rather not
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I don’t think I know you
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【多选题】
We should train them to_____________ reference books (参考书) .
①
take care of
②
take advantage of
③
make use of
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make out of
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【单选题】
When we arrived at the airport, we found our flight ________.
①
cancelled
②
had cancelled
③
had been cancelled
④
has been cancelled
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【单选题】
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①
inferior
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. stupid
③
superior
④
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【单选题】
_______ difficulties we may come across, well help one another to overcome them.
①
Wherever
②
Whatever
③
However
④
Whenever
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【单选题】
They _ on the programme for almost one week before I joined them, and now we on it as no good results have come out so far.
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had been working; are still working
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had worked; were still working
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have worked; were still working
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have worked; are still working
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We’ve missed the last bus, I’m afraid we have no _______ but to take a taxi.
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way
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choice
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possibility
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selection
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【单选题】
It seemed a long time since we last met. Identify the mistake in the sentence.
①
It
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seemed
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a
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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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36
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192
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186
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【单选题】
下列结论正确的是
①
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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反对称矩阵主对角线上的元素不一定等于零
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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
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ABC=ACB
④
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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3
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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
<img class=jc-formula data-tex=\lambda \neq 1且\lambda \neq 4 src=https://huaweicloudobs.ahjxjy.cn/85EFCF872FB86338E41D31AFFB0E4A78.png style=vertical-align: middle;/>
④
<img class=jc-formula data-tex=\lambda =-1或\lambda =4 src=https://huaweicloudobs.ahjxjy.cn/96AE0074E10C93C589CFBF062C2644E7.png style=vertical-align: middle;/>
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阅读课文II.Everybodys Jogging, 判断下列句子表述内容的正误:When you jog, you shouldent go too far or too fast; it should be comfortable for you.
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正确
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错误
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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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2x1-x2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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