【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】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】They think they’re right; ____, they are completely wrong.
【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