1.  >>  成人高等教育 / 细胞生物学
 成人高等教育 / 细胞生物学
正确率:100%

载体蛋白顺浓度梯度转运Na+入胞的同时,将葡萄糖逆浓度梯度一起带入胞内,此转运方式为( )。
  • A、
    同向协同运输
  • B、
    对向协同运输
  • C、
    被动运输
  • D、
    泵运输
  积分
 参考答案:
 佳题速递:
  • 若线性方程组中,方程的个数大于未知量的个数,则一定无解. 线性代数
  • 下列属于双方行政行为的是:( )(A) 行政立法 (B) 行政裁决 (C) 行政合同 (D) 行政处罚行政法
  • The water we drink and use is running short in the world. We all have to learn how to stop wasting our limited water. One of the steps we should take is to find ways of reusing it. Experiments have already been done in this field. Today in most large cities, fresh water is used only once, then it runs into waste system. But it is possible to pipe the used water to a purifying factory. There it can be filtered and treated with chemicals so that it can be used again, just as it were fresh from a spring. But even if every large city purified and reused its water, we still would not have enough. Then we could turn to the oceans. All we'd have to do to make use of the seawater on earth is to get rid of the salt. This process is called desalinization, and it is already in use in many parts of the world. (1)The way to stop wasting our limited water is to _ _ _ _ _ _ _ _ .(2分)A、do experiments with waterB、purify the used water and reuse itC、use fresh water once againD、make use of seawater(2)The following tells us how to reuse the used water. Which is the right order of the passage?(2分)A、to have the used water filteredB、to put chemicals in itC、to pipe it to the usersD、to pipe the used water to be purified to a factory(3)There wouldn't be enough water for us if we didn't _ _ _ _ _ _ _ _ _ .(2分)A、turn to the oceans for more waterB、reuse used water and make use of seawaterC、desalt seawaterD、take steps to reuse all water on earth(4)The word "it" in the last sentence refers to _ _ _ _ _ _ _ .(2分)A、seawaterB、purified waterC、the process of getting rid of the salt in seawaterD、the process of collecting salt from the sea oceans(5)The best title for the passage is " _ _ _ _ _ _ _ ".(2分)A、How to Reuse WaterB、Two Solutions to the Problem of Water ShortageC、Stop Wasting Our Limited WaterD、How to Make Use of Seawater新发展英语综合教程(二)
  • 题型描述: 十选项完形填空More and more teachers and parents have noticed another kind of pollution, _ _ _ _ came from the printed papers sold on streets.These printed things look like newspaper but have hardly anything to do with them. You can only find reading materials badly _ _ _ _ there----some are too strange for anyone to believe, _ _ _ _ are frightening stories of something even worse. However, many of the young students are getting absorbed in such poisonous reading, which costs them what they should pay for their breakfast and bring them nightmares and immoral ideas _ _ _ _ return. Homework is left undone, daily games lost.These sellers shout on streets selling their papers well. The writers, publishers and printers, _ _ _ _ they are, we never know, are making their silent money. The sheep skinned wolfˊs stories seem to have been forgotten once again.Why not forbid this kind of things at school? Yes, both teachers and parents have _ _ _ _ each other for more strict control of the young readers. Yet unfortunately, _ _ _ _ you want to forbid it, the more they want to have a look at it. Sometimes you may even find several children share one patched paper, which has traveled from one hand to _ _ _ _ driven by the curious nature.It really does harm to our society. It has already formed a sort of moral pollution. The _ _ _ _ teachers and parents need more powerful support. Meanwhile, the young readers need more interesting books to help them _ _ _ _ these ugly papers.1、 A. it B. this pollution C. which D. that 2、 A. made of B. made in C. made from D. made up 3、 A. others B. some others C. the other D. the others 4、 A. in B. for C. from D. as 5、 A. however B. whoever C. however D. whichever 6、 A. persuaded B. advised C. warned D. asked 7、 A. one B. the more C. if D. only when 8、 A. another B. some others C. the others D. others 9、 A. worried B. disappointed C. anxious D. puzzled 10、 A. throw away B. destroy C. fight against D. get rid of统考英语B
  • 以下正确的IP地址是( )。 计算机应用基础
  • 新建文档时,Word默认的字体和字号分别是(  ) 计算机应用基础