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【单选题】
在分光光度分析中,绘制标准曲线和进行样品测定时,应使()保持A.
浓度
B.
温度
C.
标样量
D.
吸光度
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举一反三
【单选题】Then professor walked onto the platform and seated himself in a chair, ______ for answering questions.
A.
had prepared
B.
being prepared
C.
preparing
D.
prepared
【单选题】The professor walked onto the platform and seated himself in a chair, for answering questions. [ ]
A.
had prepared
B.
being prepared
C.
was preparing
D.
prepared
【简答题】1-3-1 .简述货币流通的内涵。
【简答题】单词拼写。 1. The ___________ (气氛)changed as he walked in. 2. The professor has brought in a good ____________ (系统)of teaching languages from abroad. 3. He was very ___________ (粗暴的)when he got drunk. 4. T...
【简答题】The professor walked onto the platform and seated himself in a chair,________ for answering questions. A．had prepared B．being prepared C．preparing D．prepared
【单选题】The professor walked into the lab,___his students.
A.
to be followed
B.
followed by
C.
following
D.
being followed
【单选题】The professor walked into the lab,_________his students.
A.
to be followed
B.
followed by
C.
following by
D.
being followed
【单选题】The professor walked onto the platform and seated himself in a chair, ____ for answering questions.
A.
had prepared
B.
being prepared
C.
preparing
D.
prepared
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