皮皮学，免费搜题
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搜题
【多选题】
样品前处理常用的分离精制方法有A.
液-液萃取法
B.
液-固萃取法
C.
盐析法
D.
沉淀法
E.
浸渍法
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】—Hi, Jack. Did you go to Lucy’s birthday party? —No, I felt so sad. I_______then.
A.
didn’t invite
B.
hadn’t invited
C.
am not invited
D.
wasn’t invited
【简答题】补全对话。 Jack: Hi, Steve! Steve: 1. , Jack. How is it going? Jack: Great! 2. ? Steve: I'm not feeling well. Jack: Yeah? 3. ? Steve: Oh, I have an important English test tomorrow. Jack: Well, 4. ? Steve: ...
【单选题】_______________ uncle is a doctor and _______________ aunt is a nurse. [ ]
A.
Jack / his
B.
Jack's / his
C.
Jack's / he
D.
Jack / he
【单选题】—Hi, Tony. ____ is my friend, Jack. —Hello, Jack! Nice to meet you.
A.
He
B.
That
C.
This
D.
It
【单选题】听力原文：W: Hi, Jack! What is so interesting? M: Hi, Jane. I'm thinking about a problem. (19) You know recently I have read about a book naming Setting Life Goal. I am deeply touched by it. W: Really? Wha...
A.
He has been attacked by someone.
B.
He has got confused about the book.
C.
He has read an instructive book.
D.
He has contacted the writer.
【单选题】—Hi, Jack. Did you go to Jim's birthday party? —No, I felt so sad. I _____. [ ]
A.
didn't invite
B.
wasn't invited
C.
am not invited
D.
hadn't invited
相关题目：
【单选题】—Hi, Tony. ____ is my friend, Jack. —Hello, Jack! Nice to meet you.
A.
He
B.
That
C.
This
D.
It