—Can I my hair colored, Mom? —No. As a student, you ________ do that.
A:let; are allowed to
B:got; should be allowed to
C:get;may not
D:get; shouldn't be allowed to
水凝结成冰的过程的焓变和熵变正确的是( )
19世纪末20世纪初,资本主义生产关系有了新的发展,表现为( )