题干
.
It is in Qingdao ______ you are going to pay a visit to ______ this kind of washing machine is produced.
It is in Qingdao ______ you are going to pay a visit to ______ this kind of washing machine is produced.
A：/; that
B：where; which
C：/; where
D：what; which
答案(点此获取答案解析）
A
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。