题干
15. Justice has long ____ . (法网恢恢) Whoever breaks law will be punished by the people after all.
A：shoulder
B：hand
C：finger
D：Arm
答案(点此获取答案解析）
D
A：shoulder
B：hand
C：finger
D：Arm
，阿伏加德罗常数为NA．下列判断错误的是 （ ）
