[单选题]某气体放电试验中,研究人员需测量 “电子在单位距离内撞击气体分子引发电离的概率”,该物理量对应的表征符号是( )。(每题0.5分)(0.5)
发布时间:2025-12-01
A.α
B.β
C.γ
D.λ
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