现行的《中华人民共和国未成年保护法》保障的对象是指未满__________周岁的公民。
参考答案:R
I have lost my new English dictionary.()
A.What a pity!
B.It's nothing.
C.It doesn't matter.
D.Not at all.
对于棱柱体和圆柱体的展开,一般应用什么展开法?