以支气管一肺组织感染和阻塞为主要发病因素的疾病是

A．they are at leisure

B．they are gardening

C．they are engaged in working

D．they have numerous lovers

It can be concluded from the passage that education can ______.

A．enhance mental development

B．protect the brain from mental decline

C．prevent the brain from shrinking

D．compensate for brain shrinkage

It can be concluded from the passage that newspaper readers______.

A．apply reading techniques skillfully

B．jump from one newspaper to another

C．appreciate the variety of a newspaper

D．usually read a newspaper selectively

It can be concluded from the passage that the author______.

A．loves football only

B．hates baseball

C．loves various sports

D．likes baseball

It can be concluded from this article that the attraction of the sun is ______.

A．more than half that of the moon

B．more than that of the moon

C．more than twice that of the moon

D．half that of the moon

It can be concluded from the passage that newspaper readers

A．apply reading techniques skillfully

B．jump from one newspaper to another

C．appreciate the variety of a newspaper

D．usually read a newspaper selectively

It can be concluded from the passage that ______ .

A．rubbish is a potential remedy for the shortage of raw materials

B．local governments in the U. S. can expect big profits from recycling

C．recycling is to be recommended both economically and environmentally

D．landfills will still be widely used for waste disposal

It can be concluded from the passage that ______.

A．conflict can be overcome if we live and work alone

B．it is impossible for human beings to avoid conflict with one another

C．the best solution to the problem of conflict is isolation from the community

D．human beings have found the way to deal with their conflicts

It can be concluded from the passage that the immune systems of animals ________.

A) can be weakened by conditioning

B) can be suppressed by drug injections

C) can be affected by frequent doses of saccharin

D) can be altered by electric shocks