Echoes. An echo is a sound that is repeated because the sound waves are reflected back. Sound waves can bounce off smooth, hard objects in the same way as a rubber ball bounces off the ground. Although the direction of the sound changes, the echo sounds the same as the original sound.
Materials can be rough or smooth. Smooth material feel also let you feel something but rough materials will totally let you feel the property of the material.
In genetics, chromosome translocation is a phenomenon that results in unusual rearrangement of chromosomes. This includes balanced and unbalanced translocation, with two main types: reciprocal-, and Robertsonian translocation
Answer the following questions:(1)What do you understand by text alignment and orientation?(2)How to select contiguous and non-contiguous area in MS—Excel?