下列有关蛋白质和核酸的叙述，错误的是（　　）

读下列四幅图，图中四个国家中，灌溉农业生产技术最先进的是(    )

   I think the best place to go on Sunday is the zoo. When you are 1, you can go there with your family.  2 the zoo, there are many animals: elephants, deer , 3, rabbits and other animals. Elephants are the 4 animals on land. I 5 there is a baby elephant in our zoo. So I want to 6 at it. Yu Xuan wants to go with me. She says, " 7 we go there together?" "Sure!" I say. "We can 8 a good time there. But let's 9 there at half past four. I have 10 homework to do."

下列对于宽容的理解，正确的是（   ）
①宽容既要讲原则，又要讲策略        ②宽容指任何时候都要容人之过
③我们应该宽容他人，苛求自己        ④宽容是一种美德，是一种境界