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Author Question: For the PLC ladder logic program shown, the logic state of instruction I1 is (Read 113 times) |
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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
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Asthma cases in Americans are about 75% higher today than they were in 1980.
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Throughout history, plants containing cardiac steroids have been used as heart drugs and as poisons (e.g., in arrows used in combat), emetics, and diuretics.
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There are approximately 3 million unintended pregnancies in the United States each year.
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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.