【简答题】放大器能把微弱的电信号放大,转换成较强的电信号,它实质是一种 ________ 装置,它在 ________ 信号的控制下把 ________ 的直流能量转换成 ________ 信号的交流能量。
【判断题】Ag2CrO4的标准溶度积常数表达式为:KspΘ(Ag2CrO4)=[2cr(Ag+)]2[cr(CrO42]。( )
【简答题】如果λ噬菌体Cro蛋白和λDNA相混,就会形成Cro-λDNA,在Cro蛋白加入之前在DNA中加入腺嘌呤复合物或溴化乙锭,将会出现什么情况?
【单选题】关于历史发展的动力,下列选项中表述错误的是( )
【单选题】Ag 2 CrO 4 饱和溶液的Ksp=()。
C.
[Ag + ] 2 ·[CrO 4 2- ]
【简答题】已知:Kspθ(Ag2 CrO4)=1.1×10-12,Kspθ(AgCl)=1.8×10-10。则反应:Ag2 CrO4(s)+2Cl-====2AgCl(s)+CrO42-的Kθ= ________________。
【简答题】What would you do if you had an accident in your daily life? It is important for you to get some knowledge about first aid in your daily life. If a person has an accident, he / she needs medical care ...
【判断题】Cro蛋白对cⅠ基因的转录起负调控作用,对cro基因的转录起正调控作用。( )
【多选题】How would you know if you are encountering a problem space of effectuation?
A.
I can not calculate the probabilities for the outcomes of my actions.
B.
I do not know what is the exact goal of my venture.
C.
There are lots of information around me.But I do not know which to pay attention and which to ignore.
【单选题】Would you know __ if there was a fire in the building.