题干

如图为反映某生理过程或现象不正确的是(    )

A:若Y表示肺泡的容积,则AB曲线表示呼吸过程中吸气,肋间肌肉和膈肌收缩,肺内气压下降,膈顶下降

B:若Y表示饭后血液中葡萄糖含量变化,则BC段曲线是由于胰岛素的作用,血液中部分葡萄糖转化为肝糖元,使血糖浓度降低

C:若Y表示某温室大棚二氧化碳浓度变化,B点是傍晚时段(18时)

D:在某封闭草原,食物链:草→兔→狼,若大量捕杀狼群,Y表示兔的数量变化

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答案(点此获取答案解析)

C

同类题4

第二节:下面文章中有5处(第1-5题)需要添加小标题。请从以下选项(ABCDE和F)中选出符合各段意思的小题。选项中有一项是多余选项。

A. Get involved in student activities

B. Your voice is actually super important

C. There is a significant increase of opportunities

D. Stay in active communication with your friends

E. Get smart about the people who you spend your time with

F. Your major does not matter as much in your first of college

                                                     Five Things Nobody Told Me about College

          As I type this, I am in my university dorm room. A year ago, when I was awaiting to hear the results of my college applications, I often went to websites for some type of insider look on what college would be like. However, there’s only so much that prep books, websites, and older friends can teach. Here are the top 5things nobody told me about college:

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          Nobody entering a university knows exactly what they want to study. If they tell you otherwise, they’re lying and will probably change what they want to purse within the first quarter of attendance. During my first quarter at University of California, Riverside (UCR), I thought that I wanted to study Political Science with its focus on International Affairs, so that's what I applied for. However, once I worked with statewide and local government, I realized that a better fit for me would be Public Policy, and now I am in the process of changing my area.

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          In college, there are so many good chances for you to meet your expectations. However, there is a very important difference between wanting to do something and applying for something. In order for you to take advantage of the conferences, research, internships, and fellowships that your university offers, apply! Step into your academic advisor's office, introduce yourself, and begin making the valuable connections that are necessary to help during the rest of your college career. Great things happen when you step out of your comfort zone, and you would be surprised on how many chances exist if you just ask.

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          College is where you meet your bridesmaids, neighbors, and potential bosses. The relationships you develop now will probably be linked to the ones you value later, so be wise about the people who you invest yourself in. You are only one person, and you do not have time to waste on people who would rather cause drama or mess up with your purpose. Surround yourself with uplifting individuals who challenge you to be better while loving you for who you are, and be patient to the people who are the complete opposite of that description.

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          As a first-year, I was afraid to make any noise towards campus issues that I noticed. It was not until I became involved in student government that I gained the confidence to handle projects that I created with the help of ASUCR Office of the President. During my first quarter, I spoke directly to the Chancellor, asking him for support towards my initiatives, met with the Vive Chancellors, and cooperated with my teaching assistances to begin my undergraduate research protect. Nothing good will happen when you are silent.

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          At my high school, there were about only four active club and organizations that students could be a part of. Imagine my surprise when I stepped foot onto UCR’s campus, where over 400 organizations exist, ranging from political organizations to karate club. You are not paying all or your tuition(学费)to merely go to class, study, pass tests and graduate. Make something worthy out of your experience. Create that you will want to tell your grandchildren one day. It all begins here, by signing up to join an organization.