问题
填空题
用所给词的适当形式填空。
1. That will suit me_______ (nice).
2. The little boy is_______ (able) to reach the apple.
3. He failed his Maths examination because of his_______ (care) work.
4. What prevented you from_______ (join) us last night?
5. You should have good_______ (manner) all the time.
答案
1. nicely 2. unable 3. careless 4. joining 5. manners
，其相对原子的质量为14．下列关于碳14的说法中不正确的是( )