16. Which is not among applications of the "eddy current"?(A) The braking system of a train； (B) Mutual attraction of metals； (C) Induction cooking； (D) Propulsion of trains； (E) None.

22. Which statement is not correct according to the "theory of special relativity'? (A) Whether two events at different locations are simultaneous depends on the frame； (B) The relative velocity of two objects never precede the speed of light； (C) The "effect" may appear to occur earlier than its "cause" as observed in some frames； (D) All； (E) None.

16. Which is not among applications of the "eddy current"?
(A) The braking system of a train；
(B) Mutual attraction of metals；
(C) Induction cooking；
(D) Propulsion of trains；
(E) None.

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