一个多位数如果只有万级和个级，那么它最多只有八位数．______（判断对错）
万级最多4个数位，个级4个数位，那么它至多是4+4=8位数．
故答案为：√．
阅读短文，回答问题。
Hello, I'm Tom. Today was a bad day for me. Here was the bad news. I went to the hotel by taxi. The
driver told me many things about Kunming. I was excited about the trip. I went into the hotel, but I didn't find
my backpack. I forgot my backpack in the taxi. I ran back to the taxi. The driver has gone.
1. How did Tom go to the hotel?
_____________________________________________________
2. What happened?
3. Did Tom find his backpack?
4. What did the driver tell Tom?
观察儿童骨龄应摄（）
A.膝关节
B.踝关节
C.腕关节
D.肘关节
E.髋关节
