从旧原则
参考答案：
即新法对过去的行为一律没有溯及力，所谓“法不溯及既往”。
Even if you had not been able to see her, you ______ us.
A．told
B．had told
C．should tell
D．should have told
碘酊中碘化钾的作用是（）
A．絮凝
B．增溶
C．助溶
D. 潜溶
E．盐析
