某历史兴趣小组在探讨哥伦布的探险时，对其路线产生了下列四种不同的看法，你认为应该是哪一条路线（ ）
A：由欧洲出发，经非洲西海岸，绕过好望角，经印度洋到达印度
B：由欧洲出发，经大西洋，绕过美洲最南端，经太平洋到达菲律宾
C：由欧洲出发，经大西洋，到达加勒比海的西印度群岛和南美大陆的一些地方
D：由欧洲出发，经非洲西海岸，绕过好望角，进入印度洋
2×3＝____
7×8＝____
30－5＝____
5÷5＝____
16÷4＝____
8×4＝____
81÷9＝____
通读下面短文，掌握其大意，然后在每小题所给的四个选项中，选出一个最佳答案。
It's a fine Saturday morning. There are many people in the park. Many of 1 are young and some are old.
Some children are 2 games over there. Two boys are playing 3 their toy bats. There is a lake in the park. The water is 4 . There are some 5 on the lake. 6 the lake a young man is reading. There is a house near the lake. Beside 7 house two men are working. Look at that big tree! There are some birds 8 it. Under it are some men. Four of them are playing cards. One of them is looking at two cats. The cats are 9 up the tree. What do they 10 to do? They want to catch the birds.
用配方法解方程x2﹣4x+1=0，下列配方正确是（ ）
