填空题

The main difficulty associated with using the laser equipment is related to its ______.

【参考答案】

size
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填空题
EPRI receives financial support from ______.
单项选择题
Researchers at the University of Florida and at the University of New Mexico
A．receive funds from the same source.
B．are using the same techniques.
C．are employed by commercial companies.
D．are in opposition to each other.
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