When inserting into a B-tree, if the key is already in the tree, you should output an error message.

In a database, the template for a record is referred to as a record ______.

Fill in the blank(s) with the appropriate word(s).

Make a photocopy of and label the following

a. Upper case b. Lower case c. Ascender (2 instances) d. Descender (2 instances) e. Serif (two types) f. X-height g. Baseline