feifei-117

117. A certain viral infection is widespread among children, and about 30 percent of children infected with the virus develop middle ear infections. Antibiotics, although effective in treating bacterial infections, have no effect on the virus. Yet when middle ear infections in children infected with the virus are treated with antibiotics, the ear often clear up.

Which one of the following most helps to explain the success of the treatments with antibiotics?

A.        Although some types of antibiotics fail to clear up certain infections, other types of antibiotics might provide effective treatment for those infections.

B.        Children infected with the virus are particularly susceptible to bacterial that infect the middle age.

C.        Many children who develop middle ear infections are not infected with the virus.

D.       Most viral infections are more difficult to treat than are most bacterial infections.

E.        Among children not infected with the virus, fewer than 30 percent develop middle ear infections.

不得要领讲什么哪

i think B is the key (sorry, i can't type chinese with Njstar right now)

Paraphrase: virus is widely spreaded among children, but 30% of chidlren with the virus will develop middle ear infections. Antibiotics only cures bacterial infections, but not virus. But when the children are treated with Antibiotics, middle ear infection is cured.

B. Children infected with the virus are particularly susceptible to bacterial that infect the middle ear infections. (the bacterial caused the middle ear infections, and the antibiotics cures it)

总算明白了,antibiotics cure bacterial,but not virus, but can cure middle ear

原因-------middle ear <----bacterial<----virus, 这道题真是够垃圾的,直接说middle ear is infected by bacterial或it is bacterial taht infect middle ear不就结了嘛

美国人说话真费劲