【简答题】信息的()是指网络信息未经授权不能进行改变的一种安全特性。 A)可控性 B)不可抵赖性 C)保密性 D)完整性
【单选题】The Silk Road can be divided into ( ), Middle Road and North Road.
【简答题】10℃时加热NaHCO 3 饱和溶液,测得该溶液的pH发生以下变化: (1)甲同学认为,该溶液pH升高的原因是HCO 3 - 的水解程度增大,故碱性增强,该反应的离子方程式为____。 (2)乙同学认为,溶液pH升高的原因是NaHCO 3 受热分解,生成了 Na 2 CO 3 ,并推断Na 2 CO 3 的水解程度____(填“大于”或“小于”)NaHCO 3 ,该分解反应的化学方程式为____。...
【单选题】用pH计测量溶液pH值的原理与哪种物理量的测定原理相同
【单选题】What is the full name of the Belt and Road or the Belt and Road Initiative?
A.
The Silk Road Economic Belt and the 21st-Century Maritime Silk Road.
B.
The Silk Road and the 21st-Century Maritime Silk Road.
C.
The Silk Road Economic Belt and the Maritime Silk Road.
D.
The Silk Road Economic Belt and the 21st-Century Silk Road.
【单选题】电位法测定溶液pH与pH试纸法主要相同点是()。
【单选题】Why did we name the road "Silk Road"?
A.
Because the road began in Han Dynasty
B.
Because the road facilitaed cultural and technological exchanges
C.
Because silk was exported in large quantities via this road
D.
Because Buddhism and Islam were introduced into China via this road