People in industrial countries take in _________as they actually need every day.

A．twice as much protein

B．protein as much twice

C．twice protein as much

D．protein as twice as much

关于肺结核病，下列说法错误的是（）

A.肺部是结核杆菌的唯一感染部位

B.肺结核是一种经呼吸道传播的慢性传染病

C.肺结核主要通过空气中含结核菌的飞沫传播

D.为了预防肺结核，儿童出生后应及时接种卡介苗