方程x(x-1)=x的根是（   ）

西欧国家的殖民扩张和掠夺，客观上促进了西欧资本主义的发展，推动了世界市场的拓展。（  ）

通读下面的短文，掌握其大意，然后从各题所给的A、B、C三个选项中选出一个最佳答案。

    There is a zoo in my town. I often go there with my parents by 1 on the weekend. It usually takes my father about  2 minutes to drive there. We often leave home at about eight and  3 there at about twenty past eight.

    I like many kinds of animals, but I like4 best. First, they are verycute. Second, they are friendly, and they are one of China's    5. but now pandas are in great danger, so we must 6 them.

    Now, I'm watching the two pandas in the zoo. I  7  want to go near and play with them. 8  I also want to give them some food. But  9 the rules in the zoo:

          1. Don't go near tothe animals.

          2. Don't give10 to the animals.

    To make animals live a happy life, everyone needs to follow the rules.

每年1月到8月，油菜花便从南到北，次第而开．韶关、罗平、婺源、浦城、荆门、汉中、门源…除了这些耳熟能详的名字，很多地方也有自己别具情调的油菜花田．在这个暖暖的阳光照耀下，他们已经迫不及待地舒展开来与游人见面了．造成我国东部油菜开花日期由南向北时间差异的主要影响因素是（　　）