已知N=13xy45z,能被792整除。编程确定x、y、z的值
已知N=13xy45z,能被792整除。编程确定x、y、z的值
下列何种核型是Patau的主要核型:( ) A: 47, XY ,+21或47, XX, +21 B: 47, XXY C: 47,XY(XY),+13 D: 45, XO
下列何种核型是Patau的主要核型:( ) A: 47, XY ,+21或47, XX, +21 B: 47, XXY C: 47,XY(XY),+13 D: 45, XO
设\(z = z\left( {x,y} \right)\)是由方程\({z^3}{\rm{ + }}3xyz - 3\sin xy = 1\)确定的隐函数,则\( { { \partial z} \over {\partial y}}=\)( ) A: \( { { y\left( {\cos xy - z} \right)} \over { { z^2} + xy}}\) B: \( { { y\left( {z - \cos xy} \right)} \over { { z^2} + xy}}\) C: \( { { x\left( {\cos xy - z} \right)} \over { { z^2} + xy}}\) D: \( { { x\left( {z - \cos xy} \right)} \over { { z^2} + xy}}\)
设\(z = z\left( {x,y} \right)\)是由方程\({z^3}{\rm{ + }}3xyz - 3\sin xy = 1\)确定的隐函数,则\( { { \partial z} \over {\partial y}}=\)( ) A: \( { { y\left( {\cos xy - z} \right)} \over { { z^2} + xy}}\) B: \( { { y\left( {z - \cos xy} \right)} \over { { z^2} + xy}}\) C: \( { { x\left( {\cos xy - z} \right)} \over { { z^2} + xy}}\) D: \( { { x\left( {z - \cos xy} \right)} \over { { z^2} + xy}}\)
先天性睾丸发育不全症患者的核型是 A: 45,X B: 46,XX(XY),5p— C: 47,XX(XY),+21 D: 47,XXY E: 47,XX(XY)+13
先天性睾丸发育不全症患者的核型是 A: 45,X B: 46,XX(XY),5p— C: 47,XX(XY),+21 D: 47,XXY E: 47,XX(XY)+13
下列哪种核型为超二倍体________。 A: 45,XY,-21 B: 45,XY,21 C: 46,XY D: 47,XY,+21
下列哪种核型为超二倍体________。 A: 45,XY,-21 B: 45,XY,21 C: 46,XY D: 47,XY,+21
下列等式正确的有:{多选题} A: w'z' + w'xy + wx'z + wxyz = w'z' + xyz + wx'y'z + wyz B: z + y' + yz' = 1 C: xy'z' + x' + xyz' = x' + zy' D: xy + x'z + yz = xy + x'z
下列等式正确的有:{多选题} A: w'z' + w'xy + wx'z + wxyz = w'z' + xyz + wx'y'z + wyz B: z + y' + yz' = 1 C: xy'z' + x' + xyz' = x' + zy' D: xy + x'z + yz = xy + x'z
设方程\({e^z} - xyz = 0\)确定函数\(z=z(x,y)\),则\( { { \partial z} \over {\partial x}}=\) A: \( { { yz} \over { { e^z} - xy}}\) B: \(- { { yz} \over { { e^z} - xy}}\) C: \( { { yz} \over { { e^z} +xy}}\) D: \(- { { yz} \over { { e^z}+xy}}\)
设方程\({e^z} - xyz = 0\)确定函数\(z=z(x,y)\),则\( { { \partial z} \over {\partial x}}=\) A: \( { { yz} \over { { e^z} - xy}}\) B: \(- { { yz} \over { { e^z} - xy}}\) C: \( { { yz} \over { { e^z} +xy}}\) D: \(- { { yz} \over { { e^z}+xy}}\)
先天性睾丸发育不全综合征() A: 核型为47,XY,+18 B: 核型为47,XY,+13 C: 核型为47,XXY D: 核型为47,XY,+21 E: 核型为45,X
先天性睾丸发育不全综合征() A: 核型为47,XY,+18 B: 核型为47,XY,+13 C: 核型为47,XXY D: 核型为47,XY,+21 E: 核型为45,X
下列哪种核型为亚二倍体() A: 45,XY,-21 B: 45,XY,21 C: 46,XY D: 46,XY,-21 E: 47,XY,+21
下列哪种核型为亚二倍体() A: 45,XY,-21 B: 45,XY,21 C: 46,XY D: 46,XY,-21 E: 47,XY,+21
9. 已知函数$z=z(x,y)$由${{z}^{3}}-3xyz={{a}^{3}}$确定,则$\frac{{{\partial }^{2}}z}{\partial x\partial y}=$( ) A: $\frac{z({{z}^{4}}-2xy{{z}^{2}}-{{x}^{2}}{{y}^{2}})}{{{({{z}^{2}}-xy)}^{3}}}$ B: $\frac{z({{z}^{4}}-2xy{{z}^{2}}-xy)}{{{({{z}^{2}}-xy)}^{2}}}$ C: $\frac{z({{z}^{3}}-2xyz-{{x}^{2}}{{y}^{2}})}{{{({{z}^{2}}-xy)}^{3}}}$ D: $\frac{z({{z}^{3}}-2xy{{z}^{2}}-{{x}^{2}}y)}{{{({{z}^{2}}-xy)}^{3}}}$
9. 已知函数$z=z(x,y)$由${{z}^{3}}-3xyz={{a}^{3}}$确定,则$\frac{{{\partial }^{2}}z}{\partial x\partial y}=$( ) A: $\frac{z({{z}^{4}}-2xy{{z}^{2}}-{{x}^{2}}{{y}^{2}})}{{{({{z}^{2}}-xy)}^{3}}}$ B: $\frac{z({{z}^{4}}-2xy{{z}^{2}}-xy)}{{{({{z}^{2}}-xy)}^{2}}}$ C: $\frac{z({{z}^{3}}-2xyz-{{x}^{2}}{{y}^{2}})}{{{({{z}^{2}}-xy)}^{3}}}$ D: $\frac{z({{z}^{3}}-2xy{{z}^{2}}-{{x}^{2}}y)}{{{({{z}^{2}}-xy)}^{3}}}$