题目内容
“三农”工作固成果做到（）。
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Breakfast is the first 1______of the day. We have juice, toast with butter, eggs, and milk. We can also have cereal.We eat lunch 2______. Some people like to eat hamburgers and French fries. Others like tuna fish or egg salad sandwiches. Many 3______give children peanut butter and jelly sandwiches for lunch.In theUnitedStatesdinner is usually the biggest meal of the day. We usually eat dinner at 6:00 in the evening. A large dinner may be 4______soup, salad, meat or fish, vegetables, potatoes and dessert, and coffee, tea, or milk.It is important to eat three good meals a day. That way we can be 5______.
维持蛋白质二级结构稳定的主要作用力是（）。
有一混合蛋白质溶液，已知其中所含蛋白质的pI分别为4.6， 5.0， 5.6 ，6.7和7.8。 电泳时欲使其中四种蛋白质向正极泳动，请问缓冲溶液的pH应该设定为（ ）。
成人女性血红蛋白正常参考值范围是:
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