(2014?Yantai model) as shown in the figure, in the height of the two horizontal steps are placed on the mass of m1, m2 of the two objects, the object between the light spring phase

The overall force analysis shows that the whole by gravity, support, tension and spring force; to make the whole is in balance, then the horizontal direction must have a rightward friction force on m2, and the size of the same with the F; Therefore, B is correct;

Because m2 and the ground friction; then there must be a supportive force; Therefore, C is wrong;

And then the analysis of the force on the m2 shows that the elasticity horizontal direction should be equal to F, so the elastic force T =

F

F

sinθ

;

Because the force in the vertical direction is not clear, it is not possible to determine the relationship between the masses of the two objects; it is also not possible to find out the relationship between the spring elasticity and gravity; therefore, AD is wrong;

Therefore, the choice is: B.