问题
单项选择题 配伍题
氨基酸、维生素C和维生素B（）
A.简单扩散
B.易化扩散
C.吞噬作用
D.滤过作用
E.主动运输
答案
参考答案：E
解析：4.在母体与胎儿之间，02及C02以简单扩散方式进行交换。葡萄糖是以易化扩散方式通过胎盘，氨基酸、维生素C和维生素B以主动运输方式通过胎盘，游离脂肪酸、水、钾、钠和镁及脂溶性维生素以简单扩散方式通过胎盘。
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氨基酸、维生素C和维生素B（）
A.简单扩散
B.易化扩散
C.吞噬作用
D.滤过作用
E.主动运输
参考答案：E
解析：4.在母体与胎儿之间，02及C02以简单扩散方式进行交换。葡萄糖是以易化扩散方式通过胎盘，氨基酸、维生素C和维生素B以主动运输方式通过胎盘，游离脂肪酸、水、钾、钠和镁及脂溶性维生素以简单扩散方式通过胎盘。
I can still remember it as it was yesterday. I was a college freshman and had _______ up most of the night, laughing and talking with friends. Now just before my first _______ of the day, my eyelids were feeling heavier and heavier and my head was drifting down to my desk to make my textbook a _______. A few minutes nap(瞌睡) time before class wouldn’t _______, I thought. BOOM! I lifted my head suddenly and my eyes opened wider than saucers. I looked around with my _______ beating wildly trying to find the cause of the ________. My young professor was looking back at me with a boyish smile on his face. He had ________ dropped the textbooks he was carrying onto his desk. “Good morning!”, he said, still ________. “I am glad to see everyone is _______. Now let’s get started.” For the next hour I wasn’t sleepy at all. It wasn’t from the _______ of my professor’s textbook alarm clock either. It was instead from the _______ discussion he led. With knowledge and good _______ he made the material come _______. His insights were full of both wisdom and loving-kindness. And the enthusiasm and joy that he _______ with were contagious(富有感染力的). I ______ the classroom not only ______ awake, but a little smarter and a little better as well. I learned something far more important than not _______ in class that day too. I learned that if you are going to do something in this life, do it with _______. What a wonderful place this would be if all of us did our work joyously and well. Don’t sleepwalk your way through _______ then. Wake up! Let your love fill your work. Life is too ______ not to live it well.
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