题目内容

心的基本功能包括阶段和阶段。

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心力衰竭时，呼吸困难的表现形式有、和。

心功能不全的代偿反应是、和三大方面。

心功不全的诱因是、、、和。

Although it was his first experience as chairman, be ________ over the meeting with great skill.

A. presided
B. administered
C. mastered
D. executed