A main disadvantage of solar cells is that they:
A) Cannot produce power in large quantities
B) Cannot produce alternating current
C) Require toxic materials in their production
D) Demand relatively high maintenance
C) Require toxic materials in their production
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Wood I-joists covered with plywood can be used for site-built _____.
a. column forms b. wide pan forms c. dome-pan forms d. beam forms
?What are some of the applications of angles in welding?
A. ?To lay out parts for cutting. B. ?To locate the spot for drilling. C. ?To align parts for welding. D. ?All of the above
The cold anticipator is wired in ____ with the mercury bulb cooling contacts and is energized during the off cycle.
A. parallel B. series C. sequence D. opposition
Parasites rarely carry disease organisms from one animal to another
Indicate whether the statement is true or false