单项选择题

How can the group carry out their study

A．By using Satellite images, maps, etc.
B．By studying specific fanning methods.
C．By studying the variation of human population.
D．By analyzing the quality of crops.

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热门试题

单项选择题

Why did Go-video company sue Japanese makers

A．Because Japanese makers are tooling up to produce the VCR 2.
B．Because no Japanese companies are willing to sell needed components.
C．Because Japanese makers like to cooperate with Korean counterparts.
D．Because Japanese makers compete with them.

单项选择题

VCR has many advantages, but it also has its limits which lie in ______.

A．it's not easy to duplicate prerecorded movies
B．it can not duplicate prerecorded movies
C．it can not be operated easily
D．it takes too long to duplicate prerecorded movies