【单选题】阶跃信号具有“起始”一个函数的能力。如果某函数为 f ( t ) ,起始时间为 t 0 ,则其数学表达式是
B.
(B) f ( t - t 0 ) e ( t )
C.
(C) f ( t - t 0 ) e ( t - t 0 )
D.
(D) f ( t ) e ( t - t 0 )
【单选题】China’s media regulator has cracked down on televised singing competition shows.
B.
loosened restrictions on
C.
taken severe measures against
【单选题】下列哪项不是休克缺血与淤血期的微循环变化()
【简答题】提香的作品,《 》,画面的构图依对角线向上升华和向外扩张,欧罗巴由于紧张一手紧抓住牛角,仰面的身体呈自然的袒露开放状,透过贴身的薄纱现出丰艳的,极富感官刺激。
【单选题】- Li Hua got the champion in the piano competition. 一 _____? He never shows his talent for music! [ ]
【判断题】Competition shows great benefits to all the learners.