题目内容
气相色谱常用的流动相是CO2
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色谱法要实现两种组份的完全分离，分离度R应等于1。
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进入医院有（） 个出入口
Directions:In the boxes below are some of the words and phrases you have learned in this unit. Choose the one that best completes the sentences.1.In a tight _________ there is no one I would sooner see than Frank.2.Charles Schulz ___________ the characters 'Snoopy' and 'Charlie Brown'.3.Long skid marks on the pavement __________ the driver had attempted to brake.4.After the arrival of the United Nations soldiers, tension in the area began to _____________.5.On further ______________, it emerged that Malcolm had not been involved in the incident.6.The Prime Minister said he was trying to ________________ peace and tolerance to his people.7.It was a difficult time, but eventually things ___________ all right.8.The government had wanted to _________ this information ________ the public.9.He ______________ revenge against Surkov for separating him from his wife and son.10.The whole nation is in a state of ___________ following the attacks.11.The hated dictator had ___________ his country __________ one of the poorest police states in Europe.12.External broadcasting _____________ more resources in Britain than elsewhere.13.Employees should be fully ____________ emergency procedures.14.Don’t worry about the travel arrangements. They’re all being __________.15.Students are encouraged to take ___________ of their own learning, rather than just depending on the teacher.16.They use games and drawings to __________ their subject.
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