凝汽器停运时应注意哪些事项？

社区工作者具备的心理素质有哪些内容？

在            战争中，    ____趁火打劫，通过一系列不平等条约，共侵占中国      多万平方千米的领土。

Near the table ______ a poor dog, which desired to satisfy his hunger with something ______ fell from the table.

A．laid; that

B．lay; which

C．lays; which

D．lay; that

在油气区域勘探阶段，为物探解释提供参数而钻的探井称为（）井。它属于盆地进行区域早期评价的探并。

A、资料

B、参数

C、地质

D、探评

All this () that knowledge comes from practice.

A. speaks

B. proves

C. explains

D. teaches