What type of intersection line can you get, when a sphere cut by a plane?

The plane will ____ from Beijing Capital Airport and land in London. A: put off B: go off C: cut off D: take off

If F is a vector field, then divF is a vector field.

When a cone is cut by a plane, the intersection of the conical surface of the cone and the plane could be_______.当圆锥被平面切割时，圆锥的圆锥表面和平面的截交线可能为______。 A: Line B: Circle C: Ellipse D: Hyperbola E: Parabola

A big tree was ___ and then ___for firewood.A. cut down; cut into B. cut up ; cut inC. cut down; cut up C. cut in; cut off A: cut down; cut into B: cut up; cut in C: cut down; cut up D: cut in; cut off

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.

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.

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;

Let's go to Paris _____________. A: by plane B: by a plane C: a plane D: by the plane