10kV三相供电的电压允许偏差的额定值是（）
A.＋10％
B.＋7％
C.—10％
D.—7％
参考答案：B, D
Hardly ______asleep when someone knocked at the door.
A,she had fallen B,she fell C,had she fallen D,did she fall
全口义齿前牙应排在牙槽嵴顶的唇侧，上颌切牙切缘应位于上唇
A．下1.0mmB．下2.0mmC．上0.5mmD．上1.0mmE．上2.0mm
