(a)此反射活动属于____反射;
(b)此反射活动的反射弧依次由____、传入神经、____、传出神经和
____组成.
李商隐《无题》中赞美献身事业,奉献不止的精神的诗句是:____,____。
-- Oh, so many people are standing outside the hall. ______ will the film start?
-- ______ seven o'clock.
在Rt△ABC中,∠ACB=90°