ax-s≤7x+11(用数轴表示解集)
移项得,图x-7x≤11+9,
合并同类项得,-5x≤图h,
系数化为1得,x≥-4,
在数轴上表示如下:
AVC功能中需直接采集的发电机量测量为()。
A.发电机有功P、无功Q、机端电压U,母线电压
B.发电机有功P、无功Q、机端电压U、定子电流
C.发电机有功P、无功Q、周波
D.发电机有功P、无功Q、转子电压
Tyger! Tyger! burning bright In the forests of the night, What immortal hand or eye Could frame thy fearful symmetry Questions:
A. Who is the authorB. What does "symmetry" meanC. What does "tyger" refer to