Examlex
System software is a set of computer programs that helps a person carry out a task.
Cleavage
The tendency of a mineral to break along flat planar surfaces as determined by the mineral’s crystal structure, often enhancing its gem quality.
Atoms
The basic units of matter consisting of a nucleus surrounded by electrons, making up all chemical elements.
Lattice
A regular, repeated three-dimensional arrangement of atoms, ions, or molecules in a metal or other crystalline solid.
Octahedron
A geometric shape with eight faces, often used to describe the structure of certain crystals or molecules.
Q8: Social media services such as Facebook emphasize
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Q46: When you do not know in advance
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