以下属于直接电离辐射的是（） A: X-rays B: γ-rays C: β-rays D: neutrons
以下属于直接电离辐射的是（） A: X-rays B: γ-rays C: β-rays D: neutrons
X-rays and gamma rays can be used to detect and treat cancer ______.
X-rays and gamma rays can be used to detect and treat cancer ______.
X-rays are also called Rontgen rays _____ the discoverer who first put them to use. A: in case of B: in view of C: in place of D: in honor of
X-rays are also called Rontgen rays _____ the discoverer who first put them to use. A: in case of B: in view of C: in place of D: in honor of
导致X线穿过物质时衰减的原因是The reason for the attenuation of X-rays through the material is? X线能量X-rays' energy|X线频率X-rays' frequency|物质和距离Material and distance|X线波长X-rays' wavelength
导致X线穿过物质时衰减的原因是The reason for the attenuation of X-rays through the material is? X线能量X-rays' energy|X线频率X-rays' frequency|物质和距离Material and distance|X线波长X-rays' wavelength
In the secondary structure of roots, xylem rays and phloem rays belong to ( ). A: Secondary rays B: Vascular rays C: Pith rays
In the secondary structure of roots, xylem rays and phloem rays belong to ( ). A: Secondary rays B: Vascular rays C: Pith rays
与X线的产生条件无关的因素是The factor unrelated to the generation of X-rays is
与X线的产生条件无关的因素是The factor unrelated to the generation of X-rays is
中国大学MOOC: 导致X线穿过物质时衰减的原因是The reason for the attenuation of X-rays through the material is
中国大学MOOC: 导致X线穿过物质时衰减的原因是The reason for the attenuation of X-rays through the material is
X光片证实他没有骨折。 X-rays have ____________ (c开头，请注意词形) that he has not broken any bones.
X光片证实他没有骨折。 X-rays have ____________ (c开头，请注意词形) that he has not broken any bones.
If we have a tungsten anode (work function f=4.63 eV) and electron acceleration voltage of 35 kV, what is the minimum wavelength of the x rays? ( )
If we have a tungsten anode (work function f=4.63 eV) and electron acceleration voltage of 35 kV, what is the minimum wavelength of the x rays? ( )
X-rays are harmless to the human body
X-rays are harmless to the human body