The technology that allows engineers to penetrate rock at multiple angles instead of simply a straight line is called
A. underground mining.
B. directional drilling.
C. blasting.
D. placer mining.
B. directional drilling.
D. Holding
D. marketing.
What is true about most higher-grade metallic ores?
A. They are usually found deep below Earth's surface-more than 1,000 ft underground.
B. They are usually found very close to Earth's surface- less than 1,000 ft underground.
C. Most of them can be extracted without requiring drilling.
D. Most of them can be extracted using the placer method.
______ involves keeping the item for a short amount of time before moving it elsewhere.
A. Receiving
B. Unloading
C. Loading
D. Holding
When a person advertises a product, she is
A. communicating.
B. unloading.
C. delivering.
D. marketing.