His ideas are________and I suggest you think twice before you accept them. [      ]

A. out of control  

B. out of order

C. out of reach    

D. out of date

要了解我国汽车制造工业的生产情况，只要对第一、第二、上海汽车制造厂作一番调查就行了，这种调查方法属于 ( )

A．典型调查

B．重点调查

C．普遍调查

D．抽样调查