单项选择题

The laser represents a true marriage between science and technology, the men who devised it were ______ engineers and physicists.

A．spontaneously
B．simultaneously
C．instantaneously
D．homogeneously
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单项选择题
Once the price of the land has been ______ , we can go ahead to build the house.
A．agreed on
B．agreed to
C．agreed at
D．agreed with
单项选择题
What is it that the author wants to ______ to his readers through the story
A．convey
B．convince
C．convert
D．conform
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