What does the term crooss mean in reference to stacking objects?

Sorry two big valves your rpm will go down plus the smaller ones will give you more horsepower your rpm will go up the answer is b

Which allows college students to work part time jobs to pay for educational expenses

Which of the following characterize the historical move toward urbanization? i. increase in pollution ii. increase in frequency of natural disasters iii. increase in incidence of infectious disease a. i b. ii c. i and ii d. i and iii e. i, ii and iii