杠杆式安全阀应有防止重锤（）的装置和（）的导架
参考答案：自行移动；限制杠杆越出
机车检修周期及技术标准应按（）机车检修规程执行。
A、铁道部
B、铁路局
C、机务段
D、机车工厂
She didn’t come back to her hometown for five years and ______, she had got married and had a couple of kids.
A．to be honest
B．above all
C．on the other hand
D．in the meantime
