1 These can be two Excel files or an Excel File and a Microsoft Word file for example. 2  Press and hold down the Alt key on the keyboard. 3  Press and release the Tab key on the keyboard without letting go of the Alt key. 4  The ALT-TAB Fast Switching window should appear in the middle of your computer screen. Open at least two files in Windows. 2  These can be two Excel files or an Excel File and a Microsoft Word file for example. 3  Press and hold down the Alt key on the keyboard.
Merge this question into. Split and merge into it. Answer by Quirkyquantummechanic. Confidence votes 77.6K. Almost all of a mollusk shell is composed of calcium carbonate. It may take a few different forms and thereby appear differently, but CaCO3 is the main material in the shell.
Mollusks (Mollusca) 1  Includes snails, clams, slugs, squid, and their relatives. 2  Mollusks have soft bodies with 3 parts. 3  A mass that contains most of the organs. 4  A muscular âfootâ that is used in movement. 5  A thick flap called a mantle, which covers the body and in most species produces a heavy shell of calcium compounds.