An allergen is anything that stimulates an immune response.
Answer the following statement true (T) or false (F)
False
An antigen is anything that stimulates an immune response.
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Which of the following is NOT an occupational division found in agriculture?
a. agribusiness and agricultural production b. agricultural mechanics c. horticulture d. environmental protection and preservation
Americans' fervent isolationism in the 1930s can best be attributed to
A. their regrets about participating in WWI. B. bitter memories of the ungrateful nations that defaulted on their WWI debts. C. the totalizing impact of the Great Depression and the need to focus on getting out of it. D. the failure of most Americans to appreciate the gravity of the prospective threat to American national security posed by the militaristic, expansionist forces being harnessed during the 1930s by the Fascist dictators of Germany, Japan, and Italy. E. All of these choices are correct.
Overhead service conductors, accessible only to pedestrian traffic, must have a minimum ____-ft vertical clearance above finished grade.
A. 6 B. 8 C. 10 D. 12
The "rule of thumb" to ensure an extension ladder has the correct angle is: The base of the ladder must be _____________' from the wall for every____________' of ladder length.
A. 1, 3 B. 1, 4 C. 1, 5 D. 1, 6