单项选择题

According to the passage, it was Dr. Lillehei that ______.

A．first developed applied bionics
B．was the first to operate on the heart of a patient
C．developed the artificial heart
D．used more sophisticated methods to do "open heart" surgery

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热门试题

单项选择题

Which of the following does this passage mainly discuss

A．The application of bionics.
B．The first "open heart" surgery.
C．The development of the artificial heart.
D．The future of applied bionics.

单项选择题

Marie felt nervous when she knocked at the door because ______.

A．it was her first day in a new job
B．she was a little bit late for work
C．she was afraid that she had gone to the wrong place
D．there was no answer from inside the office