【多选题】在任何时刻,输出状态只决定于同一时刻各输入状态的组合,而与先前状态无关的逻辑电路称为 [填空(1)] ,而若逻辑电路的输出状态不仅与输入变量的状态有关,而且还与系统原先的状态有关,则称其为 [填空(2)] 。
【单选题】灰铸铁 HT200 其牌号数字 200 表示该号灰铸铁的( )最低值( MPa )。
【单选题】确立了心理与活动相统一的原理,认为心理过程不但在活动中表现出来,而且也是在活动中形成的,是前苏联著名的教育心理学家( )。
【单选题】According to ______ survey,there're more and more young people who go for a walk at ______ dusk instead of sitting in front of the computer.
【单选题】However, in ______ recent years, Niagara Falls have come to be appreciated more for their natural beauty as ______ wonder of nature.
【单选题】灰铸铁 HT200 , 其数字 200 表示的是 ( ) 。
【判断题】组合逻辑电路任一时刻的输出状态不仅决定于该时刻各输入状态的组合,还取决于电路前一时刻的输出状态()
【单选题】_________, I always feel I want a few more days.
A.
However long is a vacation
B.
However long a vacation is
C.
However is a vacation long
D.
However a vacation is long