单项选择题

A．Selecting the necessary equipment.
B．Finding a climbing partner.
C．Attending the rockclimbing class.
D．Discussing popular climbing sites.
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单项选择题
A．A day for any year.B．The animal for any year.C．The month for any year.D．The week for any month.
A．A day for any year.
B．The animal for any year.
C．The month for any year.
D．The week for any month.
单项选择题
A．It monitors the signals transmitted from the drivers brain.B．It can measure the driver’s alcohol level in the blood.C．It can quicken the driver’s response to emergencies.D．It bases its analysis on the driver’s heartbeat.
A．It monitors the signals transmitted from the drivers brain.
B．It can measure the driver’s alcohol level in the blood.
C．It can quicken the driver’s response to emergencies.
D．It bases its analysis on the driver’s heartbeat.
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