市净率与市盈率相比，前者通常用于考察股票的供求状况，多为短期投资者所关注；后者通常

The writer's purpose when writing this passage is______.

A．to describe how pruning a tree is done

B．to discuss different ways of pruning trees

C．to give practical instructions for pruning a tree

D．to explain how a tree wound gets diseased and heals

The writer's main purpose in writing the passage is to say that ______.

A．science is just at its beginning

B．science has greatly improved man's life

C．science has made profound progress

D．science has done too little to human beings

The writer's main purpose in writing the passage is to say that ______.

A．science is just at its beginning

B．science has greatly improved man's life

C．science has made profound progress

D．science has done too little to human beings

The writer's main purpose in writing the passage is to say that ______.

A．science is just at its beginning

B．science has greatly improved man's life

C．science has made profound progress

D．science has done too little to human beings

The writer' s main purpose in writing the passage is to say that______.

A．science is just at its beginning

B．science has greatly improved man's life

C．science has made profound progress

D．science has done too little to human beings

What's the writer's primary purpose in writing this passage？

A．To ask for the abolishment of uniforms.

B．To encourage people to wear fashionable clothes.

C．To show that uniforms are not possible in a democratic society.

D．To convince readers that uniforms have more disadvantages than advantages.

The writer's main purpose in writing this passage is to say that ______.

A．science has greatly improved man's life

B．science is far from perfect in exploration of the world

C．science has reached its climax in many fields

D．science has done too little to human beings

The writer's main purpose in writing this passage is to tell that science

A．has greatly improved man's life

B．is just at its beginning

C．has made profound progress

D．has done too little to human beings

The writer's main purpose in writing the passage is to say that ______.

A．science is just at its beginning

B．science has greatly improved man's life

C．science has made profound progress

D．science has done too little to human beings

The writer's main purpose in writing the passage is to say that ______.

A．science is just at its beginning

B．science has greatly improved man's life

C．science has made profound progress

D．science has done too little to human beings