丢甲、乙两颗均匀的骰子，已知点数之和为7,则其中一颗为1的概率是

在局域网模型中，物理层负责体现机械、电气和过程方面的特性，以建立、维护和拆除___。

If you have the right___(equip) ，you won’t find the job difficult.

高浓度有机废水厌氧处理一般的PH值应严格控制在（）

A task of the post office staff is to_ (class) mail according to the places it is to go

使用金属外壳的电气工具时应 ( ) 。

Any policy that may lead to the rise in unemployment is likely to meet with strong___ (resist)

This scientist was awarded with several titles for his________(accomplish) in biology

简单网络管理协议(SNMP)是一种面向无连接的协议，它工作于TCP/IP参考模型的（）层。

混凝土浇水养护时能否倒行拉胶管？