有关Cl₂的说法正确的是（　　）

阅读《钱塘湖春行》回答下面的问题。

                                                                                                                                 钱塘湖春行

                                                                                                                                唐  白居易

                                                                                                            孤山寺北贾亭西，水面初平云脚低。

                                                                                                           几处早莺争暖树，谁家新燕啄春泥。

                                                                                                           乱花渐欲迷人眼，浅草才能没马蹄。

                                                                                                           最爱湖东行不足，绿杨阴里白沙堤。

平时，一般人每分钟的心跳次数比运动员（   ）。