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【单选题】
下列试剂的保存方法不正确的是A.
NaOH溶液保存在配有玻璃塞的细口瓶中
B.
金属钠通常密封保存在煤油中
C.
浓硝酸通常保存在橡胶塞试剂瓶中
D.
氯水通常保存在棕色细口瓶中并置于阴凉处
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举一反三
【简答题】If we are to be a sustainable society, we need to encourage more farms with a method of fanning that cooperate with nature.
【判断题】If we need to draw a circle in a plane, we only need to known the diameter of it.
A.
正确
B.
错误
【简答题】3-23、NO2的Saltzman法测定原理
【多选题】When designing a system, we need to state the threat model,in another word,we need to
A.
Set of threats we are undertaking to defend against
B.
How about our cost, time and energy？
C.
Whom do we want to prevent from doing what?
D.
What is the purpose of the attacker
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