X-rays have confirmed that he ______ (break) some bones.
has broken
举一反三
- 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.
- 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 ______.
- The doctor ______ what he thought; she was pregnant. A: approved B: assured C: held some promise D: confirmed
- 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
内容
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When do some people have pains in their bones A: The coming of wet weather. B: The coming of flood. C: The coming of wind. D: The coming of dry season.
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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
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Does he have ______________brothers or sisters ? A: some B: any
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The dogs are eating some ____. A: the bone B: bone C: bones
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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? ( )