当血液由心室泵入动脉时，心脏的心房和心室的舒缩状况是（　　）

    I get up at 6:30 in the morning. Then I wash my face and brush my teeth. I go to school at 7:00. I go to school by bike. Classes begin at 7:30. We have six lessons every day. We have three lessons in the morning and three in the afternoon. Classes are over at 5:00. I get home at 5:15. We have dinner at 6:00. I go to bed at 9:00.

    魏与赵攻韩，韩告急于齐。

    齐使田忌将而往，（甲）直走大梁。魏将庞涓闻之，去韩而归（乙），齐军既已过而西矣。孙子谓田忌曰：“彼三晋之兵，素悍勇而轻齐，齐号为怯；善战者因其势而利导之。兵法：百里而趣利者蹶上将，五十里而趣利者军半至。使齐军入魏地为十万灶，明日为五万灶，又明日为三万灶。”庞涓行三日，大喜，曰：“我固知齐军怯，入吾地三日，士卒亡者过半矣。”乃弃其步军，与其轻锐倍日并行逐之。