下列人物中，曾到达红海沿岸和非洲东海岸，促进了我国和亚非各国友好往来的是（    ）

下列化学用语书写正确的是（　）

假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处。错误仅涉及一个单词的增加、删除或修改。

增加：在缺词处加一个漏字符号(^ )，并在其下面写出该加的词。

删除：把多余的词用(＼)划掉。

修改：在错的词下画一横线，并在该词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（从第11处起）不计分。

    I am a Canadian girl aging 17 and I' m mad about music. It is one of the most important thing in my life. I listen music whenever I can. I have a minidisk player, with it I can have access to music whether walking in the street or ride on the bike. At home, there is a CD player in my room, but music is on all the time. I like rock music better of all and my favorite band is Rolling stones. It so happened that there had a live concert of Rolling stones last Sunday. I went there and it was a great fun. I am also fond of classic music and I especial enjoy Beethoven when I'm doing my homework.