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提高分离电压任何难分离的物质均可在毛细管电泳中获得分离。

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CO₂可以用来作为超临界流体色谱的流动相。

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超临界流体色谱中，淋洗时间随流体的压力增加而缩短。

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两台起重机共同抬吊一个重物，已知重物质量为50t，索吊具质量为2t，不均衡荷载系数为l．1．其计算荷载应为（）。

A. 55t
B. 57．2t
C. 60．5t
D. 62．92t

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听力原文： M: Finally I’ve got the chance to put on my new suit tonight. I hope to make
a good impression on your family. W: Come on, it’s only a family reunion. So jeans and T-
shirts are just fine. Q: What does the woman mean？

A. The man has left a good impression on her family.
B. The man’s jeans and T-shirts are stylish.
C. The man should buy himself a new suit.
D. The man can dress casually for the occasion.

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提高分离电压任何难分离的物质均可在毛细管电泳中获得分离。

CO2可以用来作为超临界流体色谱的流动相。

超临界流体色谱中，淋洗时间随流体的压力增加而缩短。

两台起重机共同抬吊一个重物，已知重物质量为50t，索吊具质量为2t，不均衡荷载系数为l．1．其计算荷载应为（）。

听力原文： M: Finally I’ve got the chance to put on my new suit tonight. I hope to makea good impression on your family. W: Come on, it’s only a family reunion. So jeans and T-shirts are just fine. Q: What does the woman mean？

CO₂可以用来作为超临界流体色谱的流动相。

听力原文： M: Finally I’ve got the chance to put on my new suit tonight. I hope to make
a good impression on your family. W: Come on, it’s only a family reunion. So jeans and T-
shirts are just fine. Q: What does the woman mean？