注册咨询工程师(投资)的知识结构应当是( )的复合型知识结构。
A．多专多能
B．深而专
C．一专多能
D．专家型
参考答案：C
蜡封法测密度适宜______、______的土。
A．砂土
B．易碎
C．形状不规则及坚硬
D．细粒土
It's known that the paper for books and magazines ________ from wood.[ ]
A．are made
B．is made
C．has been made
D．is being made
