2017年4月1日，中共中央、国务院决定设立       ，这是党中央作出的一项重大的历史性战略选择。（  ）

设函数f(x)＝ax²＋b(a≠0)，若${\int }_0^3$f(x)dx＝3f(m)，则m＝(   )

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.