单项选择题

A．An artificial heart, a battery, a controller, and a transmitter.
B．An artificial heart, a battery, a wall outlet, and a transmitter.
C．An artificial heart, a battery pack, a wall outlet, and a transmitter.
D．An artificial heart, a battery pack, a controller, and a transmitter.
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Career advisers and student-support workers are mainly concerned that most students in England will have to bear the huge debt after graduation.
单项选择题
A．Let the hotel take care of valuable things. B．Take cash, credit cards along with you wherever you go. C．If something is lost in the hotel, report it to the police. D．Tell the serial numbers on the traveler’s checks to the hotel manager.
A．Let the hotel take care of valuable things.
B．Take cash, credit cards along with you wherever you go.
C．If something is lost in the hotel, report it to the police.
D．Tell the serial numbers on the traveler’s checks to the hotel manager.
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