洋地黄
A．强心B．镇静C．降低应激D．补充能量E．降低组织对儿茶酚胺的反应
参考答案：A
--- Do you think our volleyball players played very well in yesterday’s match?
--- ____. They couldn’t have done better.
A．It’s up to you
B．Not so bad
C．It’s good news
D．Absolutely
在填土（方）路基时，填土长度达（）左右时，检查铺筑土层的宽度与厚度，合格后即可碾压。
A．30m
B．50m
C．60m
D．100m
