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【单选题】
仅有免疫反应性而无免疫原性的物质是A.
超抗原
B.
半抗原
C.
完全抗原
D.
异嗜性抗原
E.
类属抗原
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【简答题】判断下面句中情态动词用法是否正确,不正确的请改正。 1. He is thirsty. He can drink water. 2. Ought you go there? 3. They need to do more exercises. 4. Tom and Lily should help each other to do it better. 5. She ought to not sh...
【单选题】According to the information, what should employees do if they need to have more details?
A.
Visit an authorized dealer
B.
Show their employee identifications
C.
Contact the customer service department
D.
Call a local department store
【简答题】A．They need to make more efforts. B．They'll have more work to do tomorrow. C．The others have done the greater part of it. D．They've finished more than half of it.
【简答题】A．They can make them rich. B．They need more people to work for them. C．They need their money to do business. D．Some people win and some lose.
【简答题】A．They need to make more efforts. B．They'll have more work to do tomorrow. C．The others have done the greater part of it. D．They've finished more than half of it.
【单选题】Why do they need more company catalogues?
A.
To use them at the conference
B.
To distribute them to the candidates
C.
To send them to the branch office
D.
To send them to their customers
【简答题】A/D转换器和D/A 转换器的主要技术参数是转换精度和_______。
【简答题】A/D 转换器的主要技术参数有: _____________ 、 _____________ 和 _____________ 。
【简答题】A/D转换器和D/A 转换器的主要技术参数是_________和转换速度。
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