人体必需的营养素有（）多种，按其化学组成和生理功能可分为：糖、脂肪、蛋白质、无机盐、维生素和水等。
A、10
B、20
C、30
D、40
参考答案：D
It is reported that nowadays more and more children _____ playing computer games.
A．are addicted to
B．are addicted with
C．addiction to
D．addiction with
