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微分方程y"=ex通解为（）。
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股价下跌到支撑线所在的位置就一定回升。( )
Friendship is important. Everyone need friendship. In all 76. ______ our lives we can live without friendship just as we can’t 77. ______ live without air and water. Friendship makes us get on 78. ______ well with one another to go ahead under different kind of 79. ______ difficulties in front of us. However, true friendship is easy to 80. ______ come by. True friendship must be sincerely and be based 81. ______ on understand each other but not on benefits of each 82. ______ other. A good friend can always be a good teachers to us. 83. ______ Through his advice, we are persuading to go the right way. So 84. ______ more friends we have, the better we can improve ourselves. 85. ______
W: Tom’s been looking after his mother in the hospital. She got injured in a car accident two weeks ago and still in a critical condition.M: Oh, that’s terrible. And you know his father passed away last year. What can we know about Tom（）
Do you find getting up in the morning so difficult that it’s painful This might be so-called laziness, but Dr Johnson has a new explanation. He has proved that everyone has a daily energy cycle,During the hours when you labour through your work you may say that you’re "hot". That’s true. The time of day when you feel most energetic is the peak of your body temperature cycle. No one has discovered why this is so, but it leads to such familiar monologues (自言自语) as: "Get up, John! You’ll be late for work again!" The possible explanation to the trouble is that John is at his temperature-and-energy peak in the evening. Much family quarrelling ends when husbands and wives get to know what these energy cycles mean, and which cycle each member of the family has.You can’t change your energy cycle, but you can learn to make your life fit it better. Habit can help. Dr Johnson believes. Maybe you’re sleepy in the evening but feel you must stay up late anyway. Counteract (对抗) your cycle to some extent by habitually staying up later than you want to. If your energy is low in the morning but you have a job of great importance to do early in the day, rise before your usual hour. This won’t change your cycle, but you’ll get up steam (鼓起干劲)and work better at your low point.Get off to a slow start which saves your energy. Get up with a leisurely yawn (呵欠) and stretch. Sit on the edge of the bed a minute before putting your feet on the floor. Avoid the troublesome search for clean clothes by laying them out the night before. Whenever possible, do routine work in the afternoon and save tasks requiring more energy or concentration for your sharper hours. If one wants to work more efficiently at his low point in the morning, he should（）
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