Each of the mechanical devices ______ its task as though nothing ______ wrong.A．perform, i

The essential part of the diesel engine, whose function is to convert the heat energy into the mechanical power, is the _____.

The device that most commonly utilizes the principle of electromagnetic induction is the__

The long service of decades of the to－be－retired with the company was______a present each

The number of the members in the House from each state______.A．is fixed, two from each sta

Some of the energy fed into the pump will be dissipated as _____ due to mechanical ineffic

Each of the fifty states of the US elects______senators.A．10B．4C．3D．2