【单选题】p→((p∧q)∨(p∧¬q))主析取范式为:
【单选题】( ┐ P→Q)→( ┐ Q ∨ P )的主析取范式中含极小项的个数为( ).
【单选题】What is usually used as the nucleus for a cultured pearl?
A.
A fragment of mollusk shell.
B.
A large grain of sand.
C.
A particle of plant material.
【单选题】Since most medium-speed diesel engines are non-reversible, what is usually used to cater for astern thrust?
B.
controllable pitch propeller
【单选题】Since most medium-speed diesel engines are non-reversible, what is usually used to cater for astern thrust?
B.
A controllable pitch propeller.
C.
A fixed pitch propeller.
【单选题】Since mot medium-speed diesel engines are non-reversible, what is usually used to cater for astern thrust?
B.
A controllable pitch propeller
C.
A fixed pitch propeller
【单选题】Since most medium-speed diesel engines are non-reversible, what is usually used to cater for astern thrust?
A.
大多数中速柴油机是不可倒转的,通常要使用什么来实现倒车推进?
C.
A controllable pitch propeller. 可调螺距螺旋桨
D.
A fixed pitch propeller. 固定螺距螺旋桨
【判断题】在严肃的工作会议上、高雅的音乐殿堂里骤然响起的手机声,就会受到大家的侧目,被视为极不礼貌的行为,这是协调功能在起作用。