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。

    On November 12, 2017, the student in our class paid visit to China Science and Technology Museum.

    At 8:00, we left to China Science and Technology Museum by bus. At 8:30, a guide introduced it to us briefly and told us that what we should pay attention to during we visit. Ten minutes late, we began our visit. Some students took notes carefully as they visited. All the students were amazing at the rapidly achievements in science and technology. Three hours has gone by before we knew it. At 11:30, we returned to our school.

    This visit no only broadened my outlook but also aroused my interest in science and technology.

下面用科学记数法表示的数，原来是什么数？地球上的海洋面积约为3.6×10⁸平方千米．

在地球、宇宙、太阳系中尺度最大的是 ____．组成原子的质子、中子、电子中带负电的是 ____，建立了原子核式结构模型的科学家是 ____