题目内容

People in Sichuan believe that worshipping the Kitchen God can help improve your cooking skills.

A. 对
B. 错

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Many snacks in Chengdu have a fascinating story behind them.

A. 对
B. 错

Sichuan people have been using chilies as a seasoning since the Kingdom of Shu.

A. 对
B. 错

形成心室肌动作电位平台期的主要离子流

A. 钾离子内流
B. 钙离子内流，钠离子内流，钾离子外流
C. 钙离子内流，钾离子外流
D. 钙离子外流，钾离子外流

蛙心插管的操作步骤包括：①剪断主动脉左右分支，②在主动脉干下方引线2根，③在心室收缩期插入插管，④在静脉窦与腔静脉交界处结扎，⑤结扎主动脉干上端。正确的操作顺序是：

A. ②⑤③①④
B. ①②③⑤④
C. ⑤②①③④
D. ④②⑤③①