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。

    Last vacation, I take a journey to the Nanxi River, which lie in the southeast of Zhejiang. It is a water theme park. The water sports equipment makes the world to come to life. It is also known as the ancient buildings and cultures. Besides, there are some another things that I will never forget, such as special noodles or all kinds of fruits. How deliciously they are! There are many excellent hotels near the Nanxi River, the prices of that are different. So travelers can choose the most suitable one. Travelers can also see the scenery from the hotel windows. In word, here is the perfect mix of funs.

    A=2×3×7，B=2×5×3，那么A和B的最大公因数是（   ）

如图，放置的一个机器零件（图1），若其主视图如（图2）所示，则其俯视图为（　　）

“要造船，就得有钢铁；要钢铁，就得靠采矿。我已经学了一年的采矿，但我现在认为，光会采矿是不行的。中国虽然地大物博，但是科学落后。如果我们自己不能找矿，将来就是给洋人当采矿工。”李四光发表这番谈话时，他正在(　　)