单项选择题

The environmental balance among ecological communities is exceedingly complex.

A．almost
B．successfully
C．extremely
D．rarely
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单项选择题
Psychologists have errantly mounted an offensive against what they describe as nastiness to ward students by educators.
A．arbitrariness
B．unpleasantness
C．severity
D．aloofness
单项选择题
Sometimes a dictionary designates a noun as attributive, which means that it can be used to describe another noun or name its attributes.
A．conveys
B．defines
C．indicates
D．explains
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