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【简答题】
激素作为一种化学信使，能把某种调节的信息由内分泌细胞携带至靶细胞。下图表示某高等动物激素的分泌及作用机制。请结合图中信息回答下列问题。 若结构乙表示胰岛A细胞，当血糖（）时，激素②的分泌增加。激素②作用的靶细胞主要是（），其接受激素②后所发生的主要代谢变化是（）
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【简答题】1.The narrator often wonders
______. (2.0分)A. why there are so many people during the Christmas season B. why most people look prosperous C. whether people will sample puddings when they have no inten...
【单选题】The narrator says his eyes are often full of tears and his heart floods when he thinks of Mangan’s sister. What do you learn about the narrator from these first-person point of view comments?
A.
Mangan’s sister has hurt the narrator’s feelings.
B.
The young narrator is in love for the first time.
C.
The narrator fears he will miss going to Araby.
D.
Mangan’s sister refuses to speak to the narrator.
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