我国跳水界根据运动员少年时期体重轻、心理负荷小的特点，跃进式地发展难度技术，这是有效地处理了 ( )

A．循序渐进与难点先行的关系

B．特长技术和全面技术的关系

C．规范化和个体差异的关系

D．合理的内部机制和正确的外部形态的关系

Adult butterflies use their senses of sight, touch, hearing, smell, and taste to survive in the world, find food and mates, lay eggs in an appropriate place, migrate, and avoid hungry predators.

Sight

Butterflies have large, compound (multifaceted) eyes, which allow them to see in all directions without turning their heads. Like most insects, butterflies are very nearsighted, so they are more attracted to a large stand of flowers rather than individual plants. Butterflies do not "see" colors such as red, green, and yellow, but sense polarized（偏振的） light, which indicates the direction the sun is shining, as well as ultraviolet light, which is present on many flowers and guides butterflies to nectar （花蜜）sources.

Smell

Butterflies have a very well-developed sense of smell, but it's not in their nose (since they don't have one). Sense receptors located in their antennae, feet, and many other parts of the body help butterflies find food (usually flower nectar), and mates (the female smells the male's pheromones).

Taste

Butterfly's feet have sense organs that can taste the sugar in nectar, letting the butterfly know if something is good to eat or not. Some females also taste host plants in order to find appropriate places to lay their eggs. Adult butterflies and moths feed using a proboscis, a long, coiled tube. Butterflies force blood into the tube to straighten it out, allowing them to feed. Butterflies get all their food from this tube.

Hearing

Butterflies don't have ears. Instead they "hear" sounds through their wings by sensing changes in sound vibrations.

Butterflies may possess senses we don't even know about yet because their anatomy is very different than ours, and therefore difficult to understand when perceived through our own human senses.

小题1:From the passage we can know that butterflies can see_____

A．thing behind them

B．thing in the distance

C．most bright colors

D．flower nectar from a distance小题2: Butterflies can easily find food resources by using their______.

A．sense organs of sight and smell

B．sense organs of sight and taste

C．sense organs of smell and hearing

D．sense organs of smell and taste小题3: How do butterflies feed themselves?

A．by using their feet

B．by using a tube.

C．by using sense receptors

D．by using their wings.小题4:What is the passage mainly about?

A．The food sources of butterflies.

B．The habits of butterflies.

C．The unusual body of butterflies.

D．the sense of butterflies.