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题目内容
（请给出正确答案）
A.程序升温色谱图中的色谱峰数与恒温色谱图中的峰数相同
B.程序升温色谱图中的色谱峰数大于恒温色谱图中的色谱峰数
C.改变升温程序，各色谱峰保留时间改变，但峰数不变
D.程序升温色谱法能缩短分析时间，改善保留时间、峰形，从而改善分离度并提高检测灵敏度，峰数也可能改变，并且使样品中的各组分在适宜的柱温下分离
更多“对同一样品，程序升温色谱与恒温色谱比较，正确的说法是（) A．程序升温色谱图中的色谱峰数与恒温色谱图中的”相关的问题
第1题
What must have happened to the writer in the end？
A．He must have spent a long time at the customs and must have been let go without any punishment.
B．He must have been given a fine as a punishment.
C．His Rolex must have been confiscated.
D．His cheap watch must have been confiscated.
第2题
What must have happened to the writer in the end？
A.He must have spent a long time at the customs and must have been let go without any punishment.
B.He must have been given a fine as a punishment.
C.His Rolex must have been confiscated.
D.His cheap watch must have been confiscated.
第3题
What must have happened to the writer in the end？
A．He must have spent a long time at the customs and must have been let go without any punishment.
B．He must have been given a fine as a punishment.
C．His Rolex must have been confiscated. "
D．His cheap watch must have been confiscated.
第4题
They have been waiting for many hours. The airplane must have been ______.
A．of schedule
B．on schedule
C．ahead of schedule
D．behind schedule
第5题
What must have happened to the writer in the end？
A.He must have spent a long time at the customs and must have been let go without any punishment.
B.He must have been given a fine as a punishment.
C.His Rolex must have been confiscated.
D.His cheap watch must have been confiscated.
第6题
What must have happened to the writer in the end？
A．He must have spent a long time at the customs and must have been let go without any punishment.
B．He must have been given a fine as a punishment.
C．His Rolex must have been confiscated. "
D．His cheap watch must have been confiscated.
第7题
A.He must have spent a long time at the customs and must have been let go without any punishment．
B.He must have been given a fine as a punishment．
C.His Rolex must have been confiscated．
D.His cheap watch must have been confiscated．
第8题
What must have happened to the writer in the end？
[A] He must have spent a long time at the customs and must have been let go without any punishment.
[B] He must have been given a fine as a punishment.
[C] His Rolex must have been confiscated.
[D] His cheap watch must have been confiscated.
第9题
A．A.must have
B．B.must have had
C．C.must have been
第10题
A．A.It must be that
B．B.It must have been
C．C.He must be it
D．D.Must have been it
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