受“莫拉克”台风影响，台湾引发了50年不遇的严重水灾，截至2009年8月19日止，大陆各界向台湾受灾同胞捐款总数已达1.76亿元人民币，把1.76亿元进行科学记数正确的是（    ）.

删除：把多余的词用\划掉

修改：在错词下画一横线，在其下写上修改后的词

    My grandfather and I enjoy fishing.

    One Sunday morning we go fishing at a lake. We took ours fishing poles and headed for the lake.As soon as we arrived, so we dropped the lines into the water.Before waiting for about half an hour, I was beginning to get impatiently, I wanted to give up, and my grandfather told me to wait a little longer. Finally, there were a sudden pull at the pole and fish was caught. Within the next few minute, my grandfather also caught a fish.

    Felt hungry, we built a fire by the lake and barbecued the fish. It was delicious.

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：把多余的词用斜线（＼）划掉。

修改：在错的词下划一横线，并在该词下面写出修改后词。

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。

    When I was young, my mother owned a store, in that she also sold magazines and books. I love to stay in the store, reading everything I found. It failed to help develop my ability to judge a good book, and it helped improve my reading skills. Then my mother began to focus on quality instead quantity. She bought books I wouldn't find them in her store. Later, as my interest at theater began, I spent most of time read Shakespeare and George Bernard Shaw, to name the few. Anyway, good storytelling opened the window to different worlds I otherwise would have never entered. In additions, when I lived through a difficultly period books became advisers.

如图，将一副直角三角板叠在一起，使直角顶点重合于点O，则∠AOB+∠DOC=____度．