正常情况下人的脉博是每分钟60到80次，试取中间数每分钟70次，估算一下心跳100万次需要的时间约为（ ）天．
10
—Did you clean up the garden yesterday?
—Yes, I did. And my mother was _____ me. [ ]
A. pleased with
B. worried about
C. friendly to
如启动时轴封供汽管暖管不充分会有什么后果？
