A．Ideal.B．Temporary.C．Partial.D．Creative.
A: Ideal.
B: Temporary.
C: Partial.
D: Creative.
A: Ideal.
B: Temporary.
C: Partial.
D: Creative.
举一反三
- Are you looking for a temporary or a(n) ______ job？ A: ideal B: valuable C: decent D: permanent
- 创意翻译为英文的词汇有（ ）。 A: Creative B: Creatity C: Idea D: Ideal E: Creativity
- 第2类拉格朗日方程表达式为____ 。 A: $\frac{{\rm{d}}}{{{\rm{d}}t}}\left( {\frac{{\partial T}}{{\partial {{\dot q}_k}}}} \right) - \frac{{\partial T}}{{\partial {q_k}}} = 0$ B: $\frac{{\rm{d}}}{{{\rm{d}}t}}\left( {\frac{{\partial T}}{{\partial {{\dot q}_k}}}} \right) - \frac{{\partial T}}{{\partial {q_k}}} = {Q_k}$ C: $\frac{{\rm{d}}}{{{\rm{d}}t}}\left( {\frac{{\partial T}}{{\partial {{\dot q}_k}}}} \right) + \frac{{\partial T}}{{\partial {q_k}}} = {Q_k}$ D: 以上都不对
- 设方程\({x^2} + {y^2} + {z^2} = 2Rx\)确定函数\(z=z(x,y)\)，则\( { { \partial z} \over {\partial x}}=\) A: \( { { \partial z} \over {\partial x}} = { { R +x} \over z}\) B: \( { { \partial z} \over {\partial x}} =- { { R +x} \over z}\) C: \( { { \partial z} \over {\partial x}} = { { R - x} \over z}\) D: \( { { \partial z} \over {\partial x}} =- { { R - x} \over z}\)
- \[设z=z(x,y)是由方程f(cx-az,cy-bz)=0所确定的函数,则a\frac{\partial z}{\partial x}+b\frac{\partial z}{\partial y}=（）\] A: a B: b C: c D: 0