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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26()
A. on
B. for
C. to
D. from
23()
A. rapid
B. soon
C. sooner
D. fast
旋光对映体中一个有活性,一个没有活性的药物
A. 异丙嗪
B. 氯苯那敏
C. 氯霉素
D. 丙氧芬
E. 多巴胺
引入芳环可增加亲脂性而引入脂肪链小则增加亲水性的是
A. 氨基
B. 氟原子
C. 烷基
D. 氧醚
E. 巯基