单项选择题

The passage shows that the author is ______ the present situation.

A．critical of
B．puzzled by
C．disappointed at
D．amazed at
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单项选择题
How long does it take for some industries acquiring commercial potential
A．From five to ten years.
B．From six to eight years.
C．From seven to eleven years.
D．From eleven to eighteen years.
单项选择题
In order to develop his company, the R&.D manager should have a sense of ______.
A．psychological communication
B．market prediction
C．management distribution
D．departmental resources development
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