一般汽轮发电机在额定负荷下运行时,功率角δ约为30~35°。()
参考答案:错
The teacher speaks very loudly _______ all the students can hear her.
A. so that B. because C. since
眶下孔的表面解剖标志位于
A.眶下缘下1.5cm处B.眶下缘外1/3和中1/3交界处C.眶下缘中1/3和内1/3交界处D.眶下缘中点下0.5~0.8cm处E.眶下缘中点和口角连线的中点