- (A) Fast counting
- (B) Extremely fast counting
- (C) Slow counting
- (D) All situations
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- (A) 10 times more
- (B) 100 times more
- (C) 100 times less
- (D) 10 times less
- (A) Chemistry
- (B) Physics
- (C) Geology
- (D) Biology
- (A) Alpha rays
- (B) Gamma rays
- (C) Beta rays
- (D) X-rays
- (A) 1 rem per week
- (B) 5 rem per week
- (C) 4 rem per week
- (D) 3 rem per week
- (A) Ordinary water
- (B) Heavy water
- (C) Lead
- (D) Aluminum
- (A) Cloud chamber
- (B) Linear accelerator
- (C) A mass spectrograph
- (D) Wilson cloud chamber
- (A) X-rays
- (B) Gamma rays
- (C) UV-rays
- (D) IR-rays
- (A) Mass is not conserved
- (B) Energy is not conserved
- (C) Momentum is not conserved
- (D) The chargee is not conserved
- (A) Smaller ionization power
- (B) Greater ionization power
- (C) Neither greater nor smaller ionization power
- (D) Same ionization power
