подчеркните в каждом предложении глагол-сказуемое и определите его видо-временную форму и залог. 1.Quantum mechanics has greatly influenced the nuclear theory.2.The problem of the structure of matter is constantly occupying the minds of scientists.3.Today many polymeric materials are produced on a massive scale.4.Many compounds can be decomposed when they are acted upon by different forms of energy.

1 has influenced(Active voice(Present Perfect))2 is occupying(Active voice( present continious))3 are produced (Passive Voice (Present))4 can be decomposed(Passive (Present))   are acted(Passive (Present))