--Jim has his wife do all the housework! Isn’t he wise?

-- Not really. He is _______.

A．more wise than lazy

B．wiser than lazy

C．more lazy than wise

D．lazier than wise

探究实验一般应遵循的程序是（　　）

①设计并完成实验 ②得出结论 ③发现并提出问题 ④作出假设．

A．④①②③

B．③④①②

C．④③①②

D．③④②①