【单选题】用N A 表示阿伏伽德罗常数的值.下列叙述正确的是( )
A.
25℃时,pH=13的Ba(OH) 2 溶液中含有的OH - 数目为0.2N A
B.
标准状况下,2.24LCl 2 与过量的稀NaOH 溶液反应,转移电子总数为0.2N A
C.
室温下,46.0gN 2 O 4 和NO 2 的混合气体中含有的原子数目为3N A
D.
78gNa 2 O 2 固体中含有的阴离子数为2N A
【单选题】机车调度室主任调度员可由组织能力和责任心强、业务精的()兼任,履行主任调度员岗位职责。
【判断题】调度指挥网络的设备主要要有火警调度机和火警电话机。()
【单选题】How does the professor develop the topic of political parties?
A.
By comparing the goals of different parties
B.
By promoting the views of a specific party
C.
By describing parties in a two-party system
D.
By explaining how to organize a party
【简答题】The two major political parties of the US are the Democratic party, which is thought to be more liberal, and ____________ , which is believed to be more conservative. _________________________________...
【判断题】The Political parties are the basis of the American political system.
【单选题】为保证水库调度业务和管理工作的正常开展,电网调度机构应根据水库调度主要职责设置水库调度工作岗位,并制订相应的()。
【简答题】处理机调度主要有高级调度、中级调度和低级调度,在多道批处理、分时和实时三种类型的OS中,必须配置()调度。