X-rays used to measure the progress of a disease are called ______ rays.
A: repeated
B: serial
A: repeated
B: serial
B
举一反三
- X-rays and gamma rays can be used to detect and treat cancer ______.
- The invisible rays of the()beyond the violet end are called the ultraviolet rays. A: speculation B: spectrum C: sleet D: range
- 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 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
- In the secondary structure of roots, xylem rays and phloem rays belong to ( ). A: Secondary rays B: Vascular rays C: Pith rays
内容
- 0
The anti-UV mutation of microorganisms must be induced by ultraviolet rays
- 1
Ultraviolet rays from the Sun can cause which of the following?
- 2
The anti-UV mutation of microorganisms must be induced by ultraviolet rays A: 正确 B: 错误
- 3
What is the essence of cathode rays? A: proton B: neutron C: electron D: atom
- 4
The seven rays of the Statue of Liberty’s crown symbolize the seven continents of the world.