单项选择题

Questions 11 to 18 are based on the conversation you have Just heard.

A．At 6:15.
B．At 5:50.
C．At 16:05.
D．At 16:15.
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单项选择题
A．It’s similar to playing notes on a piano.B．It requires a night’s sleep.C．It’s similar to the way a computer stores information.D．It requites no sleep.
A．It’s similar to playing notes on a piano.
B．It requires a night’s sleep.
C．It’s similar to the way a computer stores information.
D．It requites no sleep.
单项选择题
Clots can form when ______.
A．blood supply slows or stops
B．blood migrates to the lungs
C．blood is in deep veins
D．blood causes a pulmonary embolism
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