【单选题】【消耗次数：1】
______ hearing the news, all of them jumped with joy.
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At
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As
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By
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On
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相关题目
【单选题】
She ___________ in delight upon hearing the news.
①
claimed
②
exclaimed
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whispered
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murmured
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On hearing the news of the accident in the coal mine, she __________ pale.
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got
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changed
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went
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appeared
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20. Its impossible for all the people to get jobs because ______ of them are not fit for them.
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none
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all
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notall
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everyone
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______ the calculation is right, scientists can never be sure that they have included all variables and modeled them accurately.
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Even if
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As far as
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If only
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So long as
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In precis writing, you need to make a list of all the important points and group them under diffferent items.
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正确
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Computer classes must be __________ to every student of all grades, which will make them have a good command of the modern communication and learning tool.
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accessible
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avoidable
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随机题目
【判断题】
设F（x）是连续函数<img class=jc-formula data-tex=f\left( x \right) src=https://huaweicloudobs.ahjxjy.cn/FB6E53A56CB8DA138AA7D1A4EBCF7519.png style=vertical-align: middle;/>的一个原函数，则当F（x）是偶函数时<img class=jc-formula data-tex=f\left( x \right) src=https://huaweicloudobs.ahjxjy.cn/FB6E53A56CB8DA138AA7D1A4EBCF7519.png style=vertical-align: middle;/>是奇函数。
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正确
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错误
【判断题】
函数<img class=jc-formula data-tex=f\left( x \right) src=https://huaweicloudobs.ahjxjy.cn/FB6E53A56CB8DA138AA7D1A4EBCF7519.png style=vertical-align: middle;/>在区间I上的一个原函数称为<img class=jc-formula data-tex=f\left( x \right) src=https://huaweicloudobs.ahjxjy.cn/FB6E53A56CB8DA138AA7D1A4EBCF7519.png style=vertical-align: middle;/>在I上的不定积分。
①
正确
②
错误
【判断题】
若函数<img class=jc-formula data-tex=f\left( x \right) src=https://huaweicloudobs.ahjxjy.cn/FB6E53A56CB8DA138AA7D1A4EBCF7519.png style=vertical-align: middle;/>在点<img class=jc-formula data-tex={ x }_{ 0 } src=https://huaweicloudobs.ahjxjy.cn/ABCC8DCF3CB54080A21570A5BADC633E.png style=vertical-align: middle;/>左右两侧二阶导数符号相反，则函数在<img class=jc-formula data-tex={ x }_{ 0 } src=https://huaweicloudobs.ahjxjy.cn/ABCC8DCF3CB54080A21570A5BADC633E.png style=vertical-align: middle;/>处必有拐点。
①
正确
②
错误
【单选题】
若<img class=jc-formula data-tex=\int { f\left( x \right) dx={ x }^{ 2 } } +C src=https://huaweicloudobs.ahjxjy.cn/C0D981B86C70758C1C98445DFAB794A8.png style=vertical-align: middle;/>,则<img class=jc-formula data-tex=f^{ \prime }\left( x \right) src=https://huaweicloudobs.ahjxjy.cn/26D198C4225DCDBF49E37926C6480B23.png style=vertical-align: middle;/>=（ ）
①
x
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2x
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2
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0
【单选题】
下列定积分等于0的是（ ）
①
<img class=jc-formula data-tex=\int _{ 0 }^{ 2 }{ { x }^{ 2 } } \cos { xdx } src=https://huaweicloudobs.ahjxjy.cn/6C585115F7059B70D1A34FDD038EFF7E.png style=vertical-align: middle;/>
②
<img class=jc-formula data-tex=\int _{ -1 }^{ 1 }{ (x+\sin { x) } } dx src=https://huaweicloudobs.ahjxjy.cn/5AB9CCA2992AC0BC7819B0E2881C1ED4.png style=vertical-align: middle;/>
③
<img class=jc-formula data-tex=\int _{ -1 }^{ 1 }{ x\sin { x } } dx src=https://huaweicloudobs.ahjxjy.cn/C4D46D692EE0DC53FEB4EE8EABBE5702.png style=vertical-align: middle;/>
④
<img class=jc-formula data-tex=\int _{ -1 }^{ 1 }{ ({ e }^{ x } } +x) src=https://huaweicloudobs.ahjxjy.cn/F734B718E9C9B1A50C5AE68EAD626E35.png style=vertical-align: middle;/>
【单选题】
设<img class=jc-formula data-tex={ x }_{ n }={ (\sqrt { n } ) }^{ { (-1) }^{ n } } src=https://huaweicloudobs.ahjxjy.cn/250BBB4F504F7016C1209A5AF109FE73.png style=vertical-align: middle;/>,则数列<img class=jc-formula data-tex={ x }_{ n } src=https://huaweicloudobs.ahjxjy.cn/91CDE9AAC5253792FC0C3EB6B6DC54D5.png style=vertical-align: middle; width: 29px; height: 29px; width=29 height=29/>( )
①
有极限
②
有界
③
无界
④
为无穷大
【单选题】
<img class=jc-formula data-tex=\lim _{ x\rightarrow 0 }{ \frac { x-\sin { x } }{ { x }^{ 3 } } } = src=https://huaweicloudobs.ahjxjy.cn/DC32F13C5659A0AF22225DB223B3E5CF.png style=vertical-align: middle;/>( )
①
0
②
<img class=jc-formula data-tex=\frac { 1 }{ 2 } src=https://huaweicloudobs.ahjxjy.cn/8062EA96665D314E0B363418A4874F48.png style=vertical-align: middle;/>
③
<img class=jc-formula data-tex=\frac { 1 }{ 3 } src=https://huaweicloudobs.ahjxjy.cn/1A4C13AF1ABFF064A3C1DC1395562228.png style=vertical-align: middle;/>
④
<img class=jc-formula data-tex=\frac { 1 }{ 6 } src=https://huaweicloudobs.ahjxjy.cn/CEF961B2FDE47A2221200799932CFC46.png style=vertical-align: middle;/>