– What's your father’s occupation?– He’s ________ cook.
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I enjoy my job because it is _______.
A. exhausting
B. creative
C. boring
D. dead-end
Yang Kang's brother has to answer questions and deal with requests and complaints in the call center. What does he do?
A. He is an officer.
B. He works as a project manager.
C. He works as a customer service representative.
D. He is lawyer.
下列属于紫外-可见分光光度计的应用波长为( )
A. 200~400nm
B. 200~800nm
C. 400~800nm
D. 400~1200nm
在使用朗伯-比尔定律时,要求入射光必须是( )
A. 复合光
B. 紫外光
C. 可见光
D. 单色光
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