题干
In the end, we sent a Thanks-card and some flowers to Miss King.
A：At last
B：At first
C：At once
D：At present
答案(点此获取答案解析）
A
In the end, we sent a Thanks-card and some flowers to Miss King.
A：At last
B：At first
C：At once
D：At present
等阴离子。某同学取5份此溶液样品，分别进
行了如下实验：
三种阴离子。