心动周期中,左室内压升高速率最快的时相在
A.心房收缩期B.等容收缩期C.快速射血期D.减慢射血期E.快速充盈期
参考答案:B
在物质和精神生活中,由于感受和意识到自己的理想和目标而得到精神上的满足,称之为()。
A.荣誉
B.幸福
C.享受
D.欣慰
Not only the kids but also the teacher ________. We are worried because time is running out.
A.has lost
B.has gone missing
C.have lost their way
D.have disappeared