题干
We teenagers should the old and offer our seats to them on buses.
A：laugh at
B：depend on
C：care for
答案(点此获取答案解析）
C
We teenagers should the old and offer our seats to them on buses.
A：laugh at
B：depend on
C：care for
通入一定量的氯气，再向反应后的溶液中滴加KSCN溶液，结果溶液变为红色，则下列叙述正确的是( )
能确定通入氯气后的溶液中
白色沉淀，说明原溶液中的I－、F