皮皮学，免费搜题
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搜题
【单选题】
糖的纸色谱中常用的显色剂是A.
苯胺 - 邻苯二甲酸试剂
B.
molisch 试剂
C.
香草醛 - 浓硫酸试剂
D.
醋酐 - 浓硫酸试剂
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皮皮学刷刷变学霸
举一反三
【简答题】---Is it OK take this seat? ---Sorry._______ A. here you are B. take it C. it’s taken D.never mind
【单选题】—Which seat shall I take? —Please take ______ seat you like.
A.
whichever
B.
which
C.
whatever
D.
no matter which
【单选题】—Please have a seat . —Thank you . [ ]
A.
have a look
B.
look after
C.
take a seat
D.
take a look
【单选题】—May I put my luggage on the seat beside you, sir? —______.
A.
Sure, with pleasure
B.
Oh, please yourself
C.
Well, never mind
D.
Yes, help yourself
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