单项选择题

A．The bacteria would be killed by the human immune system.
B．The bacteria would die if brought to the surface.
C．Many antidotes and remedies are available.
D．Drilling operations are always closely monitored.
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单项选择题
A．The amount of skin affected by the cut.B．The cause of the cut.C．The amount of bleeding.D．The number of nerve endings irritated.
A．The amount of skin affected by the cut.
B．The cause of the cut.
C．The amount of bleeding.
D．The number of nerve endings irritated.
单项选择题
A．They bumped into each other over a swimming pool.B．They avoided each other by turning in different directions.C．They narrowly escaped crashing into each other.D．One plane climbed above the other at the critical moment.
A．They bumped into each other over a swimming pool.
B．They avoided each other by turning in different directions.
C．They narrowly escaped crashing into each other.
D．One plane climbed above the other at the critical moment.
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