晚期潜伏梅毒的传染性正确的是（）

A.性接触无传染性

B.性接触有传染性

C.感染胎儿的可能性约10％

D.感染胎儿的可能性约30％

E.不感染胎儿

短文改错。

     文中共有10处错误，涉及一个单词的增加、删除或修改。

     增加：在此处加一个漏字符号 ( ∧ )，并在其下面写出修改的词。

     删除：把多余的词用斜线 ( ＼ ) 划掉。

     修改：在错的词下划一横线，并在其下面写出修改后的词。

     注意：1. 每处错误及其修改均仅限一词；

               2. 只允许修改10处，多者（从十一处起）不计分。

     It would be difficulty to imagine modern life with the telephone. It has become a useful instrument of

communication, save much time and travel by enabling people to talk one another over great distances.

Nowadays it is so easy to talk cross a continent or even overseas as it is to talk to one's next-door neighbor.

Therefore, it is in emergencies which the telephone really proves its usefulness. When there is a fire, and

when someone is suddenly ill, the first thing one thinks of it is “ Where is the nearest telephone?”

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