题干
______ road out of town is good, but this one is better than the other.
A：Both
B：All
C：None
D：Neither
答案(点此获取答案解析）
D
______ road out of town is good, but this one is better than the other.
A：Both
B：All
C：None
D：Neither
为阿伏加德罗常数的值，下列叙述正确的是（ ）