举一反三
- If Vis a subspace of[img=22x19]1803b6a69db62a6.png[/img], then the coordinate vector of any vector in V relative to a basis also in[img=22x19]1803b6a69db62a6.png[/img].
- 下面哪条语句创建了一个存有10个整数的vector对象？ A: std::vector<int> v(10); B: std::vector v; C: std::vector v[10]; D: std::vector<int> v[10]; E: std::vector(int) v;
- 下列创建vector容器对象的方法中,错误的是( ) A: vector v(10); B: vector v(10, 1); C: vector v{10, 1}; D: vector v = (10, 1);
- The coordinates of a vector relative to a basis in a vector space is unique.
- 1803b6a65bf4114.pngis a basis for a vector space V. [s[img=81x51]1803b6a6653a4f6.png[/img]. Which one is the vector x? A: [img=42x51]1803b6a66d43e0e.png[/img] B: [img=28x51]1803b6a6750b972.png[/img] C: [img=28x51]1803b6a67d4b84f.png[/img] D: [img=42x51]1803b6a685bca75.png[/img]
内容
- 0
定义STL容器类vector的对象v如下，则下列操作有误的是（）。vector<;int>; v(10); A: v.push_front(1) B: v[2] = 2 C: v.back() = 10 D: cout <;<; v.size()
- 1
After simplification of any force system in space, a force and a couple are obtained. The magnitude of this force is ( ) the principal vector of the force system. A: equal to B: more than C: less than D: not equal to
- 2
If F is a vector field, then divF is a vector field.
- 3
In the vector field, the vector line is such a curve where ( ) A: The tangent direction at each point on it is orthogonal to the direction of the vector field at that point. B: The tangent direction at each point on it is parallel to the direction of the vector field at that point. C: The value of each point on it is equal to the value of the vector field at that point. D: The vector line is the geometric curve of the vector field function.
- 4
On the surface of a perfect conductor, the normal component of the electric displacement vector is A: continuous with the normal component of the electric displacement vector inside the conductor B: uncertain C: equal to the surface density of free charge on the conductor surface. D: equal to zero