问题
单项选择题
下列药物中可诱发支气管哮喘的是
A．硝普钠
B．洛贝林
C．酚妥拉明
D．酚苄明
E．普萘洛尔
答案
参考答案：E
解析：
普萘洛尔阻断β受体，但对β1和β2受体的选择性很低。β2受体阻断可增加呼吸道阻力，诱发支气管哮喘。
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下列药物中可诱发支气管哮喘的是
A．硝普钠
B．洛贝林
C．酚妥拉明
D．酚苄明
E．普萘洛尔
参考答案：E
解析：
普萘洛尔阻断β受体，但对β1和β2受体的选择性很低。β2受体阻断可增加呼吸道阻力，诱发支气管哮喘。
Teenagers are always stressed out now. They are often too busy to think about their diets and exercise. The truth is that healthy___, along with regular exercise is the only way to keep fit. During your teenager years, _____ is important to give your body the energy that needs. 50% of your calories(卡路里)should come from rice,______, vegetables and fruit. You also need to ___ a lot of water, six to eight glasses a day, _____ water will improve your skin and give you ______ hair. Exercise can help to make you look good, feel good and be healthy. Scientists suggest that ____ should spend at least 30 minutes exercising every day. When you exercise, your body produces ____. It makes you __ and energetic. It can even help you _____ better at night and let you pay more attention when you study in the day.
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