(1) reflex arc refers to the structure that completes some reflection activity. A complete reflex arc consists of five parts: receptor, afferent nerve, nerve center and efferent nerve, and its reflection path is: receptor → afferent nerve → nerve center → efferent nerve. Hand retraction reflex belongs to simple reflex activity and is controlled by spinal cord.

(2) Conditioned reflex is an advanced reflex activity, which is formed through a certain process on the basis of unconditioned reflex and with the participation of cerebral cortex. Xiaoli will consciously avoid seeing bees when her fingers are stung by bees. This reflex should belong to conditioned reflex, which is completed by her brain.

So the answer is: (1) A → B → E → C → D; E

(2) conditions; F