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【简答题】
____ and -S-S- bonds (disulfide bond) are responsible for maintaining the primary structure.
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皮皮学刷刷变学霸
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【多选题】分光光读法中,下列有关显色条件的描述中错误的有( )。
A.
选择适当的参比溶液，可消除显色剂本身颜色和某些共存的有色离子的干扰
B.
溶液酸度对显色反应无影响
C.
在绘制工作曲线和进行样品测定时，应保持一致的显色温度
D.
所谓显色时间是指加入显色剂后溶液立即出现颜色的时间
【简答题】A．He lives in the hotel. B．He lives in the same building. C．He lives in the first apartment. D．He lives on the floor.
【单选题】Passage Three Friends play an important part in our lives, and although we may take the friendship for granted, we often don't clearly understand how we make friends. While we get on well with a numbe...
A.
People usually have fewer friends than they think.
B.
People do not have to like each other to become friends.
C.
People become friends when they get on well with each other.
D.
People consider age and background unimportant in making friends.
【简答题】Kyung lives in a friendly n_______________(邻居).
【单选题】Kyung is ready to rent a home.Read about the home he rents.( Kyung准备租一套房子。 了解他租的房子。 ) Listen to the descriptions. Circle the description of Kyung’s new home.( 听这些描述。圈出Kyung的新家的描述。 )
A.
HOME 1 [音频]
B.
HOME 2 [音频]
C.
HOME 3 [音频]
D.
HOME 4 [音频]
【简答题】完型填空。 Amy is 13. She lives __ 1 __ her parents in Suzhou. She is in Grade 7. From Monday __ 2 __ Friday, she goes to school. And she usually __ 3 __ school clothes. There are lots of nice people in he...
【多选题】分光光读法中，下列有关显色条件地描述中错误的有（）。
A.
选择适当的参比溶液，可消除显色剂本身颜色和某些共存的有色离子的干扰
B.
溶液酸度对显色反应无影响
C.
在绘制工作曲线和进行样品测定时，应保持一致的显色温度
D.
所谓显示时间，是指加入显色剂后，溶液立即出现颜色的时间
【多选题】分先光读法中,下列有关显色条件的描述中错误的有()
A.
选择适当的参比溶液,可消除显色剂本身颜色和某些共存的有色离子的干扰
B.
溶液酸度对显色反应无影响
C.
在绘制工作曲线和进行样品测定时,应保持一致的显色温度
D.
所谓显色时间是指加入显色剂后溶液立即出现颜色的时间
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