由曲面[图]所围成的立体体积为（）[图]A. AB. BC. CD. D...

A . A、横断面法 B . B、分层等高线法 C . C、分区水深面颊法 D . D、多道纵断面分割法

A . 4/3π B . 8/3π C . 16/3π D . 32/3π

A .https://assets.asklib.com/psource/2015103008400019715.jpg B .https://assets.asklib.com/psource/2015103008401438024.jpg C .https://assets.asklib.com/psource/2015103008402680749.jpg D .https://assets.asklib.com/psource/2015103008403976123.jpg

A .https://assets.asklib.com/psource/2015102908433150108.png B .https://assets.asklib.com/psource/2015102908440782422.jpg C .https://assets.asklib.com/psource/2015102908443161659.jpg D .https://assets.asklib.com/psource/2015102908445394574.jpg

A . A、抽油泵 B . B、抽油杆 C . C、拙油机 D . D、油管

A .https://assets.asklib.com/psource/2015103008375170483.jpg B .https://assets.asklib.com/psource/2015103008381394355.jpg C .https://assets.asklib.com/psource/2015103008384727488.jpg D .https://assets.asklib.com/psource/2015103008390125347.jpg

A . A、流线 B . B、迹线 C . C、流束 D . D、曲线

A . A B . B C . C D . D

A . 36π B . 54π C . 72π D . 108π

若<img src='https://img2.soutiyun.com/ask/2020-12-21/977393359641804.png' />则积分区域D可以是(). A.由x轴,y轴及x+y-2=0所围成的区域 B.由x=1,r=2及y=2,y=4所围成的区域 C.由|x|=<img src='https://img2.soutiyun.com/ask/2020-12-21/97739339367075.png' />,|y|= 所围成的区域 D.由|r+y|=1,|x-y|=1所围成的区域

由曲线y=x³,直线x=2,y=0所围成的图形,分别绕x轴及y轴旋转,计算所得的两个旋转体的体积(如图5-12). <img src='https://img2.soutiyun.com/ask/2020-11-02/973169822615045.png' />

求双曲线<img src='https://img2.soutiyun.com/ask/2020-08-13/966174938267652.png' />所围成的平面图形绕y轴旋转所产生的旋转体的体积.

计算下列曲面所围成的均匀立体设p(x,y,z)=1的重心坐标: <img src='https://img2.soutiyun.com/ask/2020-11-14/974189812038412.png' />

曲线<img src='https://img2.soutiyun.com/shangxueba/ask/17664001-17667000/17665581/2015103008433015996.jpg' />围成的平面图形绕x轴旋转产生的旋转体体积是（）。 A．<img src='https://img2.soutiyun.com/shangxueba/ask/17664001-17667000/17665581/2015103008435526826.jpg' /> B．<img src='https://img2.soutiyun.com/shangxueba/ask/17664001-17667000/17665581/201510300844073703.jpg' /> C．<img src='https://img2.soutiyun.com/shangxueba/ask/17664001-17667000/17665581/2015103008442389299.jpg' /> D．<img src='https://img2.soutiyun.com/shangxueba/ask/17664001-17667000/17665581/201510300844373107.jpg' />

<img src='https://img2.soutiyun.com/ask/2020-11-25/975182524269127.png' />