什么是模具?
参考答案:
模具是指利用其本身特定形状去成型具有一定形状和尺寸的制品的工具。
短文改错
Growing up is not easy.Sometimes all that is need is someone to rely on.
For many years, she was Mum.My mother was a career woman and has her own problems to take
care, but when I needed her, she was always there.Her strength came from anywhere.I don't quite
know, somewhere very deep.She was so strong that she would never break down, even while I went
to her with all my littleboy problems and shout at her.
Her strength made me stronger and gave to me courage to try things other thought were impossible.
A helping hand is always stronger enough to lift you up.
____________________________________________________________________________
某风心病二尖瓣狭窄合并心房颤动患者,病史3年.心室率为70次/min,其房颤治疗可以考虑奎尼丁或电复律,也可以地戈辛口服治疗。