黄河是中华民族的母亲河，读图，下列有关黄河流域说法，正确的是（    ）

浓度均为、体积均为的和溶液，分别加水稀释至体积，随的变化如图所示，下列叙述错误的是 （  ）

      The word conservation has a thrifty (节俭) meaning. To conserve is to save and protect, to leave what we ourselves enjoy in such good condition that others may also share the enjoyment. Our forefathers had no idea that human population would increase faster than the supplies of raw materials; most of them, even until very recently, had the foolish idea that the treasures were "limitless" and "inexhaustible". Most of the citizens of earlier generations knew little or nothing about the complicated and delicate system that runs all through nature, and which means that, as in a living body, an unhealthy condition of one part will sooner or later be harmful to all the others.
     Fifty years ago nature study was not part of the school work; scientific forestry was a new idea; timber was still cheap because it could be brought in any quantity from distant woodlands; soil destruction and river floods were not national problems; nobody had yet studied long-terms climatic cycles in relation to proper land use; even the word "conservation" had nothing of the meaning that it has for us today.
     For the sake of ourselves and those who will come after us, we must now set about repairing the mistakes of our forefathers. Conservation should, therefore, be made a part of everyone's daily life. To know about the water table (水位) in the ground is just as important to us as a knowledge of the basic arithmetic formulas. We need to know why all watersheds (上游源头森林地带集水区) need the protection of plant life and why the running current of streams and rivers must be made to yield their full benefit to the soil before they finally escape to the sea. We need to be taught the duty of planting trees as well as of cutting them. We need to know the importance of big, mature trees, because living space for most of man's fellow creatures on this planet is figured not only in square measure of surface but also in cubic volume above the earth. In brief, it should be our goal to restore as much of the original beauty of nature as we can.

    One of the best things you can do any time in the semester is go see the professor. So hoof on over to an office hour and have some one-on-one face time with someone who’ll help you master the material and improve your grade, to boot. But how should you have this conversation with the professor?Here are five insider tips about how to make that office hour really count:.   
    (1) ______ No need to get all bent out of shape about going to see the professor. The professor would actually like to see you and answer your questions. Believe it or not, he or she is on your side and is eager to see you do well. And besides, he or she has seen many students stupider than you, so nothing you’re going to ask will set the record for stupidity.
    (2) ______ Even though you might feel more comfortable going with a friend or partner, the office hour will go better if it’s just you and the professor. You’ll get in more questions, the discussion will be tailored to what you need most help on, and two-party communication is almost always more productive than committee work. Your friend can wait outside for the discussion.
    (3) ______ If you can’t make the official office hours, most professors are willing to make individual appointments to help you out. If you’re lucky enough to land such an accommodation, though, be sure you’re 100 percent on time. There’s nothing that ticks off a professor more than making him-or herself available for a custom office hour only to find that you don’t care enough to come on time. And besides, the professor might leave after ten minutes, which would make your trip a total loss.
    (4) ______ If you’re meeting with the professor to go over a paper or test, or to ask questions about a particular lecture or reading,make sure you bring that paper or test, or your lecture notes or a copy of the article. The professor doesn’t remember the comments he or she wrote on your individual piece of work---though he or she will be able to recall them after just a brief glance at your work. And if you have your lecture notes or the article in hand, you and the professor will be able to examine specific points that are confusing to you, rather than just talking in a general way about the contents.
    (5) ______ Office hours almost always go better if you bring a few specific questions to the meeting. It’s almost never good to start a meeting with general comments such as“I didn’t understand what you said about [main topic of the course]” or“I couldn’t understand any of your lectures last week.” Much better is to come in with two or three conversation-starters about a specific concept, point, or problem you didn’t understand. Keep in mind that in a fifteen-minute office hour (which is how long these things usually last), two or three questions are usually the most you’ll have time to discuss.

阅读材料和地图，回答下列问题。
    材料一  马来西亚航空公司一架航班班号为MH370的飞机，原定由吉隆坡飞往北京，于马来西亚当地时间2014年3月8日凌晨2点40分与管制中心失去联系，至今下落不明。
    材料二  东南亚地图。

读图，完成（1）~（3）题。

    In 2004, when my daughter Becky was ten, she and my husband, Joe, were united in their desire for a dog. As for me, I shared none of their canine lust.
    But why, they pleaded. “Because I don’t have tine to take care of a dog.” But we’ll do it. “Really? You’re going to walk the dog? Feed the dog? Bathe the dog?” Yes,yes and yes.”I don’t believe you.” We will. We promise.
    They didn’t. From day two (everyone wanted to walk the cute puppy that first day), neither thought to walk the dog. While I was slow to accept that I would be the one to keep track of her shots, to schedule her vet appointments, to feed and clean her, Misty knew this on day one. As she looked up at the three new humans in her life (small, medium, and large), she calculated, "The medium one is the sucker in the pack."
    Quickly, she and I developed something very similar to a Vulcan mind meld(心灵融合). She’d look at me with those sad brown eyes of hers, beam her need, and then wait, trusting I would understand---which, strangely, I almost always did. In no time, she became my fifth appendage(附肢), snoring on my stomach as I watched television.
    Even so, part of me continued to resent walking duty. Joe and Becky had promised. Not fair, I’d balk(不心甘情愿地做) silently as she and I walked.“Not fair,” I’d loudly remind anyone within earshot upon our return home.
    Then one day-January 1, 2007, to be exact-my husband’s doctor uttered an unthinkable word: leukemia (白血病). With that, I spent eight to ten hours a day with Joe in the hospital, doing anything and everything I could to ease his discomfort. During those six months of hospitalizations, Becky, 12 at that time, adjusted to other adults being in the house when she returned from school. My work colleagues adjusted to my taking off at a moment’s notice for medical emergencies. Every part of my life changed; no part of my old routine remained.
    Save one: Misty still needed walking. At the beginning, when friends offered to take her through her paces, I declined because I knew they had their own households to deal with.
    As the months went by, I began to realize that I actually wanted to walk Misty. The walk in the morning before I headed to the hospital was a quiet, peaceful time to gather my thoughts or to just be before the day’s medical drama unfolded. The evening walk was a time to shake off the day’s upsets and let the worry tracks in my head go to white noise.
    When serious illness visits your household, it’s not just your daily routine and your assumptions about the future that are no longer familiar. Pretty much everyone you know acts differently.
    Not Misty. Take her for a walk, and she had no interest in Joe’s blood or bone marrow test results. On the street or in the park, she had only one thing on her mind: squirrels! She was so joyful that even on the worst days, she could make me smile. On a daily basis, she reminded me that life goes on.
    After Joe died in 2009, Misty slept on his pillow.
    I’m grateful-to a point. The truth is, after years of balking, I’ve come to enjoy my walks with Misty. As I watch her chase a squirrel, throwing her whole being into the here-and-now of an exercise that has never once ended in victory, she reminded me, too, that no matter how harsh the present or unpredictable the future, there’s almost always some measure of joy to be extracted from the moment.