Which Chinese region has experienced the greatest recent economic expansion?
A) the central provinces
B) the western provinces
C) Inner Mongolia
D) the provinces along the coast
E) the region surrounding the Gobi Desert
D) the provinces along the coast
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Trichloroethane (TCE) was commonly used at industrial sites as a solvent to remove grease from machines and engines. The spent TCE was dumped in the environment and polluted large areas of groundwater. Eventually, it was discovered that the surfactants used in laundry detergent worked just as well and are less harmful to the environment. Which action represents the switch to surfactants?
A. waste reduction B. waste management C. reuse and recycle D. waste processing
Which of the following is an optical phenomenon that forms in a similar manner as the halo?
A. corona B. tangent arc C. sun pillar D. rainbow
Briefly summarize the El Niño Southern Oscillation.
What will be an ideal response?
Which of the following is the study of the rates of chemical reactions?
A) kinetics B) stoichiometry C) thermodynamics D) none of these