8.Three particles travel through a region of space where the magnetic field is out of the page, as shown in the figure. The electric charge of each of the three particles is, respectively,
 
(A) 1 is positive, 2 is neutral, and 3 is negative
(B) 1 is positive, 2 is negative, and 3 is neutral
(C) 1 is neutral, 2 is negative, and 3 is positive
(D) 1 is neutral, 2 is positive, and 3 is negative
(E) 1 is negative, 2 is neutral, and 3 is positive

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統計: A(3), B(0), C(0), D(0), E(16) #3081248