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【单选题】
()是幼儿注意的特点之一。A.
注意的范围小
B.
注意的稳定性强
C.
有意注意占优势，无意注意开始发展
D.
注意的分配能力较强
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【简答题】核酸的基本结构单位是 。核酸的特征元素是 。
【单选题】What a role do lymphocytes play in the human body?
A.
To reduce the rate of dying while still a fetus.
B.
To raise the body’s immunity against infection.
C.
To help prevent the development of heart disease.
D.
To help prevent the development of diabetes.
【单选题】听力原文：M: Did you get the part you wanted in the play? W: That role was given to someone else, but I got a better part. Q: How does the woman probably feel? (16)
A.
Disappointed.
B.
Sad.
C.
Happy.
D.
Regretful.
【单选题】听力原文：W: Did you get the part you tried out for in the play? M: That role was given to someone else. W: I'm sorry to hear that. M: But I got a better part! How does the man probably feel?
A.
Happy.
B.
Resentful.
C.
Disappointed.
D.
Sentimental.
【简答题】核酸的基本结构单位是 _____ , 特征元素 ____。
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