问题
单项选择题
关于儿茶酚胺与α受体结合后产生的效应，下列哪项错误（）
A.血管收缩
B.妊娠子宫收缩
C.扩瞳肌收缩
D.小肠平滑肌收缩
E.竖毛肌收缩
答案
参考答案：D
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关于儿茶酚胺与α受体结合后产生的效应，下列哪项错误（）
A.血管收缩
B.妊娠子宫收缩
C.扩瞳肌收缩
D.小肠平滑肌收缩
E.竖毛肌收缩
参考答案：D
“Kevin, we are getting a divorce,” said my mother. My heart plunged (急降). I was 9 years old and I thought that my life was going to ________. My brother and I were going to move with my mother to southern California. My dad was to ______ in New Jersey because of work. My family was splitting apart. Now that my mom is a ________ parent, I do my own laundry, make dinner and do extra chores around the house. _______ it was hard at first, I now recognize the positive ________ that this responsibility had on me. My mother gave me these _______ and duties so that I would learn to become self-disciplined (自律的) and trustworthy. I strive to show these ______ in my life, and have seen the benefits. When I was only 11 years old, my ______ told me that he was selecting me as soccer team captain because of my determination and ability to get my teammates to ________ themselves. We _________the championship, but I won the fair play award for keeping my team together. I am always determined to be an individual and not participate in anything that I feel is ________. I am, for example, extremely _______ of my decision not to drink alcohol. Personally, I don’t feel the need to drink to have fun, and I stand by my decision even when others try to ________ me. My mom and dad both found new _______ and happily remarried. I am ______ close to my father, even though he lives 4,800 km away. I thought my parents’ divorce was going to be the worst thing that _______ happened to me. Ironically (讽刺的是), it turned out to be the ______. I wasn’t willing to let it _______ my life without putting up a fight, and neither was my family. At age 9, I fought with the confusion and ________ of divorce. Today, at age 16, I understand that _______ can bring opportunity and success, and that hard work, determination and self-discipline can turn your worst time into your best time.
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