题目

人体进食后，胰液开始分泌。胰液分泌受神经和体液双重调节。下图为人的胰腺分泌的调节示意图，请据图（1）神经调节的基本方式是 _______________________ 。（2）在上图中，食物刺激有关感受器，最终通过迷走神经（传出神经）释放乙酰胆碱作用于胰腺，引起胰液的分泌，乙酰胆碱是一种___________________________。（3）图中酸性食糜可刺激小肠黏膜内的S细胞分泌激素X,X通过血液循环作用于胰腺细胞，引起胰液分泌，X是____________________，该激素作用于靶细下面是四位同学写给《21世纪中学生英文报》编辑 Editor Lee的求助信。在信中，四位同学分别谈了自己在学习或生活中的问题。A. 请将四封信与问题进行配对，并把序号A、B、C、D填入题题后相应的横线上。 (A)Dear Editor Lee,Recently I have much difficulty in falling asleep. When I go to bed, though I feel sleepy,I always think a lot and can’t fall asleep. So I always feel tired in class and sometimes my head hurts badly. Can you give me some advice?Steven(B)Dear Editor Lee,I am a student from Junior middle school.I am good at all the subjects except English.I can’t remember words well. I am not good at speaking and listening .What shall I do?Could you give me some advice?John (C)Dear Editor Lee,I have a problem. I really don’t know what to say when I meet strangers .I find it hard to talk with others because I am afraid they might laugh at me.I’m not as clever and funny as my friends .If people start to talking to me, they will think that I’m just boring.Please help me.Ann(D)Dear Editor Lee,I was getting on well with my best friend .But a few days ago, another friend of mine told me that my best friend often said bad words about me. When I heard this, I was very angry. What shall I do? Should I stop being her friend or stay with her as usual ?Betty