在下 图 所示电路中,已知 FET 的 V GS(off) = - 1V , I DSS =1mA ,若电容 C D 对交流信号呈短路, v i =10mV ,其他电路参数如图中所示 。则可求得 I S ≈ ( ), A v d2 ≈ ( ), A v c2 ≈ ( ) K CMR ≈ ( ), v o ≈ ( )。
【简答题】In a metrical foot of two syllables, if the unaccented syllable is followed by an accented syllable, then this metrical foot is called an ___________.