根据短文理解完成下列各题。

    Denzil wasn't a very clever donkey. He always did some silly things because he didn't think. "Look out," the other donkeys said. "Here comes Denzil—everybody runs away!"

    One day, Denzil carried two heavy bags of salt, one on each side of his back. When he was crossing a big river, he fell into the water. The salt began to melt. When he tried his best to stand up, all the salt was gone. "Hey, that's really great," thought Denzil. "I must remember that. Next time I can do it again when I'm crossing a river."

    The next time he carried two bags of cotton(棉花). "Watch this, everybody," said Denzil when he and his friends got to the middle of the river. He went into the water and was gone! Nobody told him that cotton could get heavier in water. The other donkeys pulled him out at once and luckily he was still alive.

下列各句中，没有语病的一句是(　　)

如图甲所示电路，电源电压为6V，当S闭合时，电压表的读数如图乙所示，则L₁两端的电压为____ V，L₂两端的电压为____ V．

某小组探究了花生仁和核桃仁哪个含的能量多。经过三次重复实验，得出了如下表的实验数据。下列对表中实验数据的描述不正确的是（　　）

    Mr. Lin has a store. It's next to No. 5 Middle School. It sells maps, books, pens, pencils, clothes and some other things. The things in his store are not expensive. Boys and girls like to go to his store. They like Mr. Lin because he is very nice. Mr. Lin likes the boys and girls, too. Mr. Lin has a “lost and found” box in his store. Look! A baseball, a ruler and some books are in the box. This box helps some boys and girls find their lost things. A sofa is in Mr. Lin's store, too. Boys and girls can sit there and read books after school. They can ask Mr. Lin questions about these books and he often helps them to find the answers.