Given： <img src="https://nimg.ppkao.com/2018-08/wenxueying/2018080111400650032.png?sign=89ecf21ecae159f726da3fdb8bd665c7&t=62d1aa15" /> Which&ensp;two，&ensp;inserted&ensp;at&ensp;line&ensp;11，&ensp;will&ensp;allow&ensp;the&ensp;code&ensp;to&ensp;compile？（）

A、public&ensp；class&ensp；MinMax<；？>；&ensp；{

B、public&ensp；class&ensp；MinMax<；？extends&ensp；Number>；&ensp；{

C、public&ensp；class&ensp；MinMax<；Nextends&ensp；Object>；&ensp；{

D、public&ensp；class&ensp；MinMax<；Nextends&ensp；Number>；&ensp；{

E、public&ensp；class&ensp；MinMax<；？extends&ensp；Object>；&ensp；{

F、public&ensp；class&ensp；MinMax<；Nextends&ensp；Integer>；&ensp；{

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第1题

[] Given that: Gadget has-a Sprocket and Gadget has-a Spring and Gadget is-a Widget and Widget has-a Sprocket Which two code fragments represent these relationships? （）

A、A.<img src="https://img.ppkao.com/2018-08/longzhengxuan/2018080116372242416.jpg" /> B.<img src="https://img.ppkao.com/2018-08/longzhengxuan/2018080116372748968.jpg" /> C.<img src="https://img.ppkao.com/2018-08/longzhengxuan/2018080116373495076.jpg" /> D.<img src="https://img.ppkao.com/2018-08/longzhengxuan/2018080116373950755.jpg" /> E.<img src="https://img.ppkao.com/2018-08/longzhengxuan/2018080116374889300.jpg" /> F.<img src="https://img.ppkao.com/2018-08/longzhengxuan/2018080116375347013.jpg" />

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第2题

[] Certkiller.com has given you the task of serializing an object and writing it to a data file using binary serialization. You need to ensure that you meet these requirements. What should you do?（） Certkiller.com has given you the task of serializing an object and writing it to a data file using binary serialization. You need to ensure that you meet these requirements. What should you do?（）

A、A.<img src="https://img.ppkao.com/2018-07/zhanglijun/2018072715253748274.jpg" /> B.<img src="https://img.ppkao.com/2018-07/zhanglijun/2018072715254192159.jpg" /> C.<img src="https://img.ppkao.com/2018-07/zhanglijun/2018072715254446111.jpg" /> D.<img src="https://img.ppkao.com/2018-07/zhanglijun/2018072715254768261.jpg" />

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第3题

[] 如图所示的关系R和S，计算：R1=R-S、R2=R∪S、R3=R∩S、R4=R×S。

A、如图所示的关系R和S，计算：R1=R-S、R2=R∪S、R3=R∩S、R4=R×S。 <img src="https://img.ppkao.com/2019-04/tangxixi/2019041908441976394.jpg" /><img src="https://img.ppkao.com/2019-04/tangxixi/2019041908442583053.jpg" />

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第4题

[] 传播速度为100m/s、频率为50Hz的平面简谐波，在波线上相距0.5m的两点之间的相位差是（）

A、A.<img src="https://img.ppkao.com/2019-04/tangxixi/2019041215575492782.jpg" /> B.<img src="https://img.ppkao.com/2019-04/tangxixi/2019041215575986570.jpg" /> C.<img src="https://img.ppkao.com/2019-04/tangxixi/2019041215580850575.jpg" /> D.<img src="https://img.ppkao.com/2019-04/tangxixi/2019041215581577569.jpg" />

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第5题

[] 面积为S的空气平行板电容器，极板上分别带电量±q，若不考虑边缘效应，则两极板间的相互作用力为（）

A、A.<img src="https://img.ppkao.com/2019-04/wangjue/2019042816230963090.jpg" /> B.<img src="https://img.ppkao.com/2019-04/wangjue/201904281623119775.jpg" /> C.<img src="https://img.ppkao.com/2019-04/wangjue/2019042816231473858.jpg" /> D.<img src="https://img.ppkao.com/2019-04/wangjue/201904281623172810.jpg" />

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第6题

[] 简述常见的磨损类型和特点？

A、某材料的应力幅和失效循环周次如下： <img src="https://img.ppkao.com/2018-09/chenmenghui/2018092811424376274.jpg" /> <img src="https://img.ppkao.com/2018-09/chenmenghui/2018092811425951475.jpg" /> 试绘制S－N曲线，并确定疲劳极限；如设计要求最少疲劳寿命105次，则许用的最大循环应力是多少？

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第7题

[] Given： 10.interface&ensp;Data&ensp;{&ensp;public&ensp;void&ensp;load（）；&ensp;} 11.abstract&ensp;class&ensp;Info&ensp;{&ensp;public&ensp;abstract&ensp;void&ensp;load（）；&ensp;}&ensp; Which&ensp;class&ensp;correctly&ensp;uses&ensp;the&ensp;Data&ensp;interface&ensp;and&ensp;Info&ensp;class？（） Given： 10.interface&ensp;Data&ensp;{&ensp;public&ensp;void&ensp;load（）；&ensp;} 11.abstract&ensp;class&ensp;Info&ensp;{&ensp;public&ensp;abstract&ensp;void&ensp;load（）；&ensp;}&ensp; Which&ensp;class&ensp;correctly&ensp;uses&ensp;the&ensp;Data&ensp;interface&ensp;and&ensp;Info&ensp;class？（）

A、A.<img src="https://img.ppkao.com/2018-08/wenxueying/2018080114295971472.png" /> B.<img src="https://img.ppkao.com/2018-08/wenxueying/2018080114300659438.png" /> C.<img src="https://img.ppkao.com/2018-08/wenxueying/2018080114301390095.png" /> D.<img src="https://img.ppkao.com/2018-08/wenxueying/2018080114301865887.png" />

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第8题

[] 下图为CA6140型卧式车床传动系统图：（1）试写出车削导程S=3mm时的车螺纹传动路线表达式。（2）根据车刀的用途可分为哪7种？

A、下图为CA6140型卧式车床传动系统图： <img src="https://img.ppkao.com/2019-04/leiyawen/2019041015355681589.jpg" /> （1）试写出车削导程S=3mm时的车螺纹传动路线表达式。 （2）根据车刀的用途可分为哪7种？

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第9题

[] Certkiller .com has a server named Certkiller -SR05 that has numerous processors installed. You have been given the task of developing an application that displays certain clock speed statistics on all processors installed on Certkiller -SR05. You need to ensure that this requirement is fully satisfied. What should you do?（） Certkiller .com has a server named Certkiller -SR05 that has numerous processors installed. You have been given the task of developing an application that displays certain clock speed statistics on all processors installed on Certkiller -SR05. You need to ensure that this requirement is fully satisfied. What should you do?（）

A、A.<img src="https://img.ppkao.com/2018-07/zhanglijun/2018072715094615949.jpg" /> B.<img src="https://img.ppkao.com/2018-07/zhanglijun/2018072715095199276.jpg" /> C.<img src="https://img.ppkao.com/2018-07/zhanglijun/2018072715095581120.jpg" /> D.<img src="https://img.ppkao.com/2018-07/zhanglijun/2018072715095870672.jpg" />