[单选题]
Cloud chambers have been repl6bd)l:r-+x 3elrctikd6dmr+ acezox wok,qp52 57ac1 xy )+geoad by bubble chambers because
A. the radioactive clouds were too dangerous to work with.
B. the density of fluids is greater than the density of vapors.
C. bubble chambers tend to be larger and more expensive.
D. gamma rays are visible in bubble chambers, but not in cloud chambers.
Post time 2024-1-22 01:01:29