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【多选题】
地中海膳食结构包括（ ）
A.
每月食用几次红肉
B.
富含植物性食物
C.
食物加工程度低，新鲜度高
D.
橄榄油在膳食中所占比例低
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举一反三
【单选题】β片层结构:
A.
只存在于α角蛋白中
B.
只有反平行结构,没有平行式结构
C.
α螺旋是右手螺旋,β片层是左手螺旋
D.
主链骨架呈锯齿形成的片层
E.
肽平面的二面角与α螺旋的相同
【单选题】Passage2Questions 21 to 25 are based on the following passage:People travel for a lot of reasons. Some tourists go to see battlefields or religious shrines. Others are looking for culture, or simply w...
A.
they want to see historic remains or religious spots.
B.
they are interested in different cultural traditions and social customs.
C.
they would like to take pictures in front of famous sites.
D.
they wish to escape from the cold, dark and rainy days back at home.
相关题目：
【单选题】β片层结构:
A.
只存在于α角蛋白中
B.
只有反平行结构,没有平行式结构
C.
α螺旋是右手螺旋,β片层是左手螺旋
D.
主链骨架呈锯齿形成的片层
E.
肽平面的二面角与α螺旋的相同
【单选题】Passage2Questions 21 to 25 are based on the following passage:People travel for a lot of reasons. Some tourists go to see battlefields or religious shrines. Others are looking for culture, or simply w...
A.
they want to see historic remains or religious spots.
B.
they are interested in different cultural traditions and social customs.
C.
they would like to take pictures in front of famous sites.
D.
they wish to escape from the cold, dark and rainy days back at home.
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