D09－32捣固车2013型大抄平传感器为了克服因振动而引起的颤抖，在平衡框架轴的两端安装了阻尼油盒，油盒内加有粘度很高的硅油及（）。
参考答案：阻尼块
When he learned that his brother had returned from abroad, he set off to his home _____. Which of the
following is not OK? [ ]
A. immediately
B. right away
C. right then
D. right now
E. at once
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