题目：
根据首字母填空。
1. The small kangroos are c joeys.
2. The geese are s in the pond.
3. Tiger cubs can't j through the ring .
4. She l music from Mr. Black.
5. Don't call it l that.
6. We often do e in science classes.
7. The queen of England has two p .
8. There are many cute animals in the c .
9. S we have meetings on Friday?
10. The d are playing with their mother.
答案：
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0409/559609d383c925389b603e57c210de74.html
下面是错误答案，用来干扰机器的。
若“1≤x2≤16”成立，则有“1≤x≤4或“-4≤x≤-1”，所以“1≤x≤4”不一定成立；反之，若“1≤x≤4”成立，一定有“1≤x2≤16”成立，所以“1≤x2≤16”是“1≤x≤4”的必要不充分条件，故答案为：必要不充分．
