问题
单项选择题
水溶性葡萄糖由胃肠道进入血液,并由血液进入神经组织的一系列通过生物膜的方式()
A.简单扩散
B.滤过
C.主动转运
D.异化扩散
E.膜动转运
答案
参考答案:D
水溶性葡萄糖由胃肠道进入血液,并由血液进入神经组织的一系列通过生物膜的方式()
A.简单扩散
B.滤过
C.主动转运
D.异化扩散
E.膜动转运
参考答案:D
Eating is important to everyone. 1 “Fast food is easy,” says Sarah Hudson, a 14-year-old high school student from the U.S.A. she is enjoying her lunch at McDonald’s. “It’s quick and delicious.” She eats fast food about twice a week. Now each American eats about three hamburgers and four bags of French fries(or potato chips) every week. That is 2 520 calories(卡路里). 2 Most Americans know that fast food isn’t good for them. But it seems that they can’t give it up. 3 and fast food restaurants are part of American life,96﹪ of American school children know McDonald’s 4 In America,33﹪ of them are overweight (or too heavy).That makes it hard for them to move around, go upstairs and even breathe. 5 Of course it’s not just young people who are getting heavier. It’s all Americans.
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