What will happen if whale numbers drop to a certain degree？
A. The number will bounce back at a certain point.
B. Whales begin to adapt to new living conditions.
C. The extinction of whales becomes unavoidable.
D. A biological disaster will come to the earth.
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A. whereB. whoC. thatD. what
A. where
B. who
C. that
D. what
Under the support of money and price mechanism, people can __________~
A. regulate the supply of goods and the demand of services
B. compare the difference between goods and services
C. manage the balance between demand and supply
D. make economic plans in highly developed societies
A. Models of the first planes used for mail delivery.B. A copy of a railway mail car.C. Al
A. Models of the first planes used for mail delivery.
B. A copy of a railway mail car.
C. All the unusual stamps.
D. A motorbike.
A. Students are not required to attend regular class lectures.B. The professor records cl
A. Students are not required to attend regular class lectures.
B. The professor records class lectures for review.
Classes are held at various locations throughout the area.
D. Students receive credit for work experience.
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