Answer:
a. Multimeter
Explanation:
A Multimeter which is an electrical device that can be operated by hand and can be used to measure voltage, current and resistance in a circuit is the best tool which the technician must use to make sure all racks are properly grounded.
An infinitive phrase is a group of words introduced by "an infinitive", This group of words may function as a noun, adjective or adverb. In the following example the infinitive phrase is working as an adjective, since it modifies the noun "topic".
<em>The best </em><u><em>topic</em></u><em> </em><u><em>to write about</em></u><em> </em><em>is one you know well.</em>
<em> noun infinitive phrase</em>
Answer:
There aren't any computers.
Explanation:
To change any sentence into negative you must change the axillary verb into negative.
