张岚家养了35只鸡，其中母鸡的只数是公鸡的4倍，张岚家养的公鸡、母鸡各有多少只？
公鸡：35÷（1+4）=7（只）；母鸡：7×4=28（只）
4165读作：（ ）；3006读作：（ ）。
Why are RDAs regularly updated
A．New discoveries in the science of nutrition are constantly being made.
B．Americans' diets are constantly changing.
C．As people age, their nutritional needs change.
D．Very little is currently known about nutrition.
