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.

在原文没明确指出中耳炎是由bacterial引起的情况下，可以如此肯定的推出答案B吗？

1，原题中，antibiotics对bacterial infections有效，对the virus无效.

2，得了中耳炎，同时感染了the virus,用antibiostics治疗，耳朵常常复原。

3，根据1，2，可以建立一种联系，bacterial可能是中耳炎的诱因之一。

期待nn们的解释~~~~~~

把老题翻出来问问，哪位NN可以帮忙翻译下选项B的意思？我是能够理解bacterial可能是中耳炎的诱因，但是不太理解B的意思，是说被病毒感染的孩子和引起中耳炎的bacterial的关系，不是在解释antibiotics为什么有效嘛。

ding~~

麻烦NN们解答下下，B的意思到底是什么？谢啦！

help to explain类似于加强题。

就是找到，对virus没用，但是对bacterial 有用，可以治疗中耳炎的，中间证据了。