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Pick out the correct statement. | |
A. | Positron is the antiparticle of electron. [Correct Answer] |
B. | In α-decay, the ratio of neutron to proton decreases. [Wrong Answer] |
C. | Ionising power of β-rays is higher than that of α-rays. [Wrong Answer] |
D. | Speed of α-rays is more than that of γ-rays. [Wrong Answer] |