题目

如图，教师课上做的一个演示实验，将中间开孔的两块圆饼状磁铁用一根木棒穿过，手拿住木棒（保持水平）此时两磁铁保持静止，当手突然释放，让木棒和磁铁一起下落时，发现两块磁铁向中间靠拢并吸在一起了，下列说法正确的是（） A . 放手下落时，磁铁惯性减小 B . 放手下落时，木棒与磁铁间弹力减小，导致最大静摩擦力减小 C . 手拿住静止时，任意一块磁铁所受的重力大于木棒对它的弹力 D . 手拿住静止时，任意一块磁铁所受的磁力小于阅读下面短文，根据短文回答问题。Today’s story is about Zhu Hui, a student from Shenzhen. He’s now studying in the United States. He’s living with an American family in New York. Today is the Dragon Boat Festival. It’s 9:00a.m. and Zhu Hui’s family are at home. His mom and aunt are making zongzi. His dad and uncle are watching the boat races on TV.Is Zhu Hui also watching the races and eating zongzi? Well, it’s 9:00p.m.in New York, and it’s the night before the festival. But there isn’t a Dragon Boat Festival in the US, so it’s like any other night for Zhu Hui and his host family. The mother is reading a story to her young children. The father is watching a soccer game on TV. And what’s Zhu Hui doing? He’s talking on the phone to his cousin in Shenzhen. Zhu Hui misses his family and wishes to have his mom’s delicious zongzi. Zhu Hui likes New York and his host family a lot, but there’s still “no place like home”.【1】Where is Zhu Hui now?______________________________________【2】Why are Zhu Hui’s family watching boat races and making zongzi?______________________________________【3】What’s the mother doing ?______________________________________【4】Does Zhu Hui like his host family?______________________________________【5】What does he think about his home in China?______________________________________