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【简答题】
阅读理解。 Recently, one of my best friends, whom I've shared just about everything with since the first day of kindergarten, spent the weekend with me. Since I moved to a new town several years ago,we've both always looked forward to the few times a year when we can see each other. Over the weekend, we spent hours and hours, staying up late into the night, talking about the people she was hanging around with. She started telling me stories about her new boyfriend, about how he experimented with drugs and was into other selfdestructive behaviour. I was blown away! She told me how she had been lying to her parents about where she was going and even stealing out to see this guy because they didn't want her around him. No matter how hard I tried to tell her that she deserved better, she didn't believe me. Her selfrespect seemed to have disappeared. I tried to convince her that she was ruining her future and heading for big trouble. I felt like I was getting nowhere. I just couldn't believe that she really  thought it was acceptable to hang out with a bunch of losers, especially her boyfriend. By the time she left, I was really worried about her and exhausted by the experience. It had been so frustrating, I had come close to telling her several times during the weekend that maybe we had just grown too far apart to continue our friendship, but I didn't. I put the power of friendship to the final test. We'd been friends for far too long. I had to hope that she valued me enough to know that I was trying to save her from hurting herself. I wanted to believe that our friendship could conquer anything. A few days later, she called to say that she had thought long and hard about our conversation, and then she told me that she had broken up with her boyfriend. I just listened on the other end of the phone with tears of joy running down my face. It was one of the truly rewarding moments in my life. Never had I been so proud of a friend. 1. In the writer's opinion, her friend ________. A. was a girl with no selfrespect B. could find a better boyfriend C. was brave enough to stick  to her own choice D. didn't value the writer's suggestion 2. What did the writer worry about? A. She would lose the friendship with her. B. Her friend's parents would be worried about their daughter. C. Her friend would get into great trouble with the boy. D. Her friend's boyfriend would be in great trouble. 3. We may learn from Paragraph 3 that the writer________. A. didn't want to go anywhere else B. understood her friend's hanging with her boyfriend C. couldn't  believe  that  her  friend's  choice  was acceptable D. doubted that she could in any way help her friend 4. What can be concluded from the passage? A. Friendship starting from childhood is not reliable. B. Friendship is a cure for any injury in life. C. Friendship should be everlasting once begun. D. Friendship can have magical power in life.
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【多选题】狭义外汇是指以外币表示的,可直接用于清偿国际间债权债务的支付手段。下列属于狭义外汇的是( )。
A.
美元现钞
B.
欧元存单
C.
美元远期外汇
D.
英镑支票
E.
美元债券
【判断题】外汇是指外币现钞
A.
正确
B.
错误
【单选题】下列关于做功与能量变化的关系说法 错误 的是:( )
A.
合外力对质点做的功等于质点动能的增量.
B.
作用于质点系的所有外力和内力做功总和等于质点系动能的增量
C.
系统内力中的保守力做的功等于系统势能的增量负值
D.
外力和保守内力做功的总和等于系统机械能的增量
【多选题】狭义外汇是指以外币表示的,可直接用于清偿国际债权债务的支付手段。下列属于狭义外汇的是( )。
A.
美元现钞
B.
欧元存单
C.
美元远期汇票
D.
英镑支票
【判断题】质点系总动能的增量等于外力的功与 质点系内保守力 的功和质点系内非保守力的功三者之和。
A.
正确
B.
错误
【判断题】质点系总动能的增量等于外力的功与质点系内保守力的功和质点系内非保守力的功三者之和,即是质点系的动能定理。
A.
正确
B.
错误
【多选题】质点系的动能与势能之和,成为机械能。关于质点系的机械能,下列说法正确的是
A.
质点系在运动过程中,其机械能的增量等于外力和内力做功的总和。
B.
当只有保守内力做功时,质点系的总机械能保持恒定
C.
没有外力做功时,质点系的总机械能保持恒定
D.
质点系在运动过程中,其机械能的增量等于外力的功和非保守内力的功的总和。
【简答题】最大诚信原则的内容包括( )A. 告知B、保证C、弃权D、禁止反言
【简答题】质点系从一个状态运动到另一个状态时,质点系的机械能的增量等于外力与非保守内力作功的总和,此原理称为质点系的( )。
【多选题】以下关于功和能量的说法正确的是:
A.
重力是保守力,重力做功与质点运动路径无关
B.
弹力是保守力,弹力作正功时,弹性势能增加
C.
系统外力与非保守力做功之和等于系统机械能的增量
D.
一段时间内,作用力与反作用力作的总功为0
E.
系统外力做功之和等于系统总动能的增加
F.
内力作用不改变系统动量
G.
内力作用不改变系统动能
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