【单选题】物质对一定波长的X射线的质量衰减系数与物质的原子序数的关系是
【单选题】质量衰减系数是用来描述()
A.
带电粒子与物质相互作用中,单位厚度的能量损失份额
B.
X(γ)射线与物质相互作用中,单位厚度的相互作用几率
C.
带电粒子与物质相互作用中,单位质量厚度的能量损失份额
D.
X(γ)射线与物质相互作用中,单位质量厚度的相互作用几率
E.
X(γ)射线与物质相互作用中,强度衰减一半时的物质厚度
【单选题】质量衰减系数是用来描述
A.
带电粒子与物质相互作用中,单位厚度的能量损失份额
B.
X(g)射线与物质相互作用中,单位厚度的相互作用几率
C.
带电粒子与物质相互作用中,单位质量厚度的能量损失份额
D.
X(g)射线与物质相互作用中, 单位质量厚度的相互作用几率
E.
X(g)射线与物质相互作用中,强度衰减一半时的物质厚度
【单选题】And the horses _______up to the finish line. They’re neck and neck ... and neck all the way. Oh, the Italian horse Mamma Miu _______ the race!
【单选题】The word “neck” in the phrase “the neck of the bottle” is related to _______.
A.
onomatopoeic motivation
C.
morphological motivation
D.
etymological motivation
【单选题】-I've been using the computer for a long time and my neck doesn't feel well. -____________________
A.
You'd better stop the work and take a rest.
C.
Keep away from the medicine.
【单选题】The word “neck” in the phrase “the neck of the bottle” is related to ____.
A.
onomatopoeic motivation
C.
morphological motivation
D.
etymologically motivation