题干
If there no buying and selling of animals, there no killing in nature.
A：is; will be
B：will be; will be
C：is; is
答案(点此获取答案解析）
A
If there no buying and selling of animals, there no killing in nature.
A：is; will be
B：will be; will be
C：is; is
2SO3达到平衡后，若保持温度和体积不变，向容器中充入由18O所组成的氧气，当达到新平衡后，下列结论正确的是( )
