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【单选题】
关于免疫球蛋白单体结构最确切的说法是A.
二条多肽链
B.
四条多肽链
C.
两条轻链和两条重链
D.
二硫键连接的四条多肽链
E.
二硫键连接的二条轻链和二条重链
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【简答题】完形填空 Inspiration 'Mama, when I grow up, I'm going to be one of those!' I said this after seeing the Capital Dancing Company perform when I was three. It was the first time that my __ 1 __ took on a vi...
【单选题】－When do you ______ every day? －After getting up and before going to bed.
A.
go home
B.
get dressed
C.
brush your teeth
D.
eat dinner
【简答题】阅读理解。 Effort less English Full 6 Months 200% Money Back Guarantee No English club will guarantee the textbooks you buy. No teacher will return money to you if you don't learn anything, but I will! I g...
【单选题】听力原文：I'm going out for a light lunch after reviewing this paper. (A) When did he leave? (B) He can come with us. (C) I'll catch up with you at the cafe. (9)
A.
B.
C.
【简答题】retention money guarantee
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【单选题】How long is the product usually guaranteed for?
A.
It has a 1-year money back guarantee.
B.
It has a limited 30-day guarantee.
C.
It has a 3-year limited warranty.
D.
It has a 1-year limited warranty.
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