【单选题】【消耗次数：1】
下列选项中能够计算双倍余额递减法折旧额的是（ ）。
①
DDB函数
②
SLN函数
③
IF函数
④
INT函数
参考答案：
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下列函数中既是奇函数又是增函数的是（ ）
①
<img class="kfformula" src="20190808/1565254637580775.png" data-latex="y=\frac {1} {x}"/>
②
<img class="kfformula" src="20190808/1565254637194153.png" data-latex="y=-\frac {1} {3}x"/>
③
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<img class="kfformula" src="20190808/1565254637197572.png" data-latex="y=2{x}^{2}"/>
【单选题】
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①
<img class=jc-formula data-tex={ y=x }^{ 2 } src=http://60.205.157.60/formula/a@7B0EE7D80F39D4227EF2FBAA344CB439.png style=vertical-align: middle;/>sinx
②
<img class=jc-formula data-tex={ y=2 }^{ x } src=http://60.205.157.60/formula/a@292654F59D6271EAB1A18AD5A52621BE.png style=vertical-align: middle;/>
③
y=xcosx
④
y=ln2
【单选题】
下列函数中为奇函数是（ ）
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<img src=https://huaweicloudobs.ahjxjy.cn/0E966CC9FB6F4654101036636E8001CA.png title=图片1.png alt=图片1.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/43D475DC8D553CBCFACF1FF582DC4E8A.png title=图片2.png alt=图片2.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/D5D48A040E148AE6AB29CD6EEC657C0E.png title=图片3.png alt=图片3.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/FF91F832B71F018808B77CF2C899E34A.png title=图片4.png alt=图片4.png/>
【单选题】
下列函数中是奇函数的是（ ）
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<img class="kfformula" src="20190808/1565253233633468.png" data-latex="y=x+{x}^{2}"/>
②
<img class="kfformula" src="20190808/1565253233837122.png" data-latex="y=-\sqrt {x}"/>
③
<img class="kfformula" src="20190808/1565253233536783.png" data-latex="y=\frac {x} {1-{x}^{2}}"/>
④
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下列函数中是增函数的是（ ）
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<img src="20190730/1564477377822527.png" title="1564477377822527.png" alt="图片117.png"/>
②
<img src="20190730/1564477370221072.png" title="1564477370221072.png" alt="图片116.png"/>
③
<img src="20190730/1564477418409058.png" title="1564477418409058.png" alt="图片118.png"/>
随机题目
【判断题】
Given that they are fresh from the university, the young people have done a good job.
①
正确
②
错误
【单选题】
The number of pages in this dictionary ___ about two thousand.
①
are
②
has
③
have
④
is
【单选题】
And you find that youre not to be ___ with a position of real responsibility.
①
offered
②
trusted
③
furnished
④
retained
【单选题】
She got married although her parents had not given her their ___.
①
allowance
②
consent
③
permit
④
appreciation
【单选题】
The secretary and principal ___ at the meeting now.
①
are speaking
②
is speaking
③
were making a speech
④
have a speech
【单选题】
“If anybody ___, please put down ___ name,” said the teacher to the monitor.
①
?wants to buy the book/his
②
?want to buy the book/their
③
?will buy the book/one’s
④
?wants to have the book bought/her