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【单选题】
薄层色谱法与纸色谱法相比,具有的优点是( )A.
设备简单
B.
操作方便
C.
样品用量少
D.
能用腐蚀性显色剂
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举一反三
【单选题】在施工图不完整或当准备发包的工程项目内容、技术经济指标一时尚不能明确具体地予以规定时,比较适宜的合同形式是()
A.
不变总价合同
B.
可调值不便总价合同
C.
固定总价合同
D.
成本加酬金合同
【单选题】在施工图不完整或当准备发包的工程项目内容、技术经济指标一时尚不能明确具体地予以规定时，比较适宜的合同形式是（）
A.
不变总价合同
B.
可调值不便总价合同
C.
固定总价合同
D.
成本加酬金合同
【单选题】I hope it won`t be too crowed on the train.
A.
Yes, all the people are in a hurry.
B.
No, I don`t think it well.
C.
Really? I have no idea about this.
D.
You are right. Neither do I.
【单选题】This film_________ the scenes of my childhood.
A.
called up
B.
called on
C.
called out
D.
called for
【简答题】The Johnstown flood is described as an example of a disaster that resulted from the combination of______and ______.
【简答题】In linguistics, ______ refers to the study of the rules governing the way words are combined to form. sentences in a language, or simply, the study of the formation as sentence.
【单选题】The search was ______ when the fog got thicker.
A.
called off
B.
called on
C.
called in
D.
called for
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