举一反三
- 正确的局部剖视的俯视图是（ ）。http://image.zhihuishu.com/testzhs/onlineexam/ueditor/201704/92590bf0d14d4b84b33452c42154dd1a.png
- 已知f(t)↔F(w)，则下列说法正确的是（） A: tf(t)↔wF(w) B: F(t)↔f(w) C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/e987a05c70d3455bad2fbdef6ce1fc1d.png" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/92f68075a5ff43708660199e4eed9415.png" />
- 已知f1(t)和f2(t)波形如下，若f(t)=f1(t)*f2(t)，则f(0)=http://image.zhihuishu.com/zhs/onlineexam/ueditor/201906/e38151c6fa664a008f547dd1af821f92.bmp
- 如图所示，在边长为a的正六面体的棱边CD上，作用着与其重合的力F，则力F对x、y、z轴的矩为[img=351x334]17de8f8200fff66.png[/img] A: Mx(F)= -Fa， My(F)=Fa， Mz(F)=0 B: Mx(F)=0 My(F)=0 Mz(F)=Fa C: Mx(F)=Fa My(F)= -Fa Mz(F)=0 D: Mx(F)=0 My(F)=0 Mz(F)=0
- 用牛顿迭代法解方程f(x)=0，选初始值x0满足( )，则它的解序列收敛到方程f(x)=0的根。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201903/aeb6aa356de84f49ad3697df7563111a.jpg
内容
- 0
设f(x)连续函数，则=（ ）。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/d61df8d810544f27ada3ecb86c2d853a.png
- 1
逻辑函数的最小项表达式为() A: F=Σm（0、2、5、7） B: C: F=Σm（1、3、6） D: F=Σm（0、1、2、6、7）
- 2
已知物体的主、俯视图，左视图正确的是（ ）。 A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201905/3930fea847ba4492944ddb365a59ad61.png" border="0" vspace="0" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201905/8c60c5d1b6634256b2ef9a91dac8488e.png" border="0" vspace="0" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201905/c0b01d9bd70846c0a833771f3e1329f0.png" border="0" vspace="0" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201905/f4f8a566f2de4d289c53bb491395d1fe.png" border="0" vspace="0" />
- 3
下面是轴测图的是（ ）。 A: <img src="http://image.zhihuishu.com/testzhs/onlineexam/ueditor/201702/748c4269a50a4aa2bfab8b91fd4f0a48.png" /> B: <img src="http://image.zhihuishu.com/testzhs/onlineexam/ueditor/201702/fd1616f4949a4f5dbe2d263f38f5bbf6.png" /> C: <img src="http://image.zhihuishu.com/testzhs/onlineexam/ueditor/201702/d6dae74b734542a99835980a703c3222.png" /> D: <img src="http://image.zhihuishu.com/testzhs/onlineexam/ueditor/201702/9c9af01bbf134f52be1439f428bb093a.png" />
- 4
f(x)在[0,1]上有连续的二阶导数，f(0)=f(1)=0,任意x属于[0,...715af2ac3f81f8.png"]