Why is electronic waste a problem?
A. It contains toxic heavy metals.
B. It contains toxic dioxin.
C. It contains toxic PCBs.
D. It contains lead-based paint.
Answer: A
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At which of the following times does a mountain breeze develop its maximum strength?
A. about an hour after sunset B. just before sunrise C. about midnight D. early afternoon
Compared to shifting cultivation, intensive subsistence agriculture is characterized by which of the following?
A) smaller farms B) lower population densities C) greater use of animal power D) more diversified cropping E) greater use of land in rainforests
In the Public Land Survey System, _______________ defines a point east or west of a principal meridian and _______________ defines a point north or south of a base line
Fill in the blank(s) with correct word
In the diagram, the densest part of the Earth is labeled as
A. A B. B C. C D. D E. E