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【图片】如图所示的液压系统,两液压缸有效面积为A1=A2=100【图片】,缸Ⅰ的负载F1=4×【图片】N,缸Ⅱ的负载F2=2.5×【图片】N,溢流阀、顺序阀和减压阀的调整压力分别为5.0MPa, 2MPa和2.5MPa。试分析液压泵启动后,两换向阀处于中位时B点的压力值为( )MPa。
A.
2
B.
2.5
C.
4
D.
5
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举一反三
【多选题】第二节: 信息匹配(共5小题;每小题1分,满分5分) 请阅读下列应用文及相关信息,并按照要求匹配信息。请将答案填写在答题卡标号为76-80的相应位置上.注意: E='AB;' F=CD Molly 信箱是一个报刊栏目,主持人Molly 回答读者提出的各种问题. 第1至第5题是五位读者的来信.请从
A.
B.
C.
D.
E.
F中为每封来信选出合适的答复. 76. Dear Molly, I have a problem. My parents are always talking to me about studying. They want me to study harder so I can go to a good school. I know studying is very important, but my parents put too much pressure on me. How can I explain to my parents that I need some free time? ------ Overworked 77. Dear Molly, My best friend Tony is a nice young man, but he has a bad habit. He is always late. No matter where he is going or what he is doing, he is never on time. Once he turned up thirty minutes late for a meeting! What can I do to break him of this bad habit? ------ Worried 78. Dear Molly, I have a new roommate named Louis. He is a good friend of mine, but he is driving me crazy because he is very untidy. He leaves his dirty clothes everywhere, and he never makes his bed. I am extremely neat. What can I do? ---- Unhappy 79. Dear Molly, My cousin plays computer games a lot and he keeps on talking to me about various games. I don’t have any interest at all, but I find it difficult to stop him without hurting his feelings. Would you kindly give me some advice? ----- Shy 80. Dear Molly, I’m feeling upset these days because the result of my last English exam was not as good as I had expected. My teacher comforted me, saying “Don’t worry. You can do better next time.” But I’m still feeling bad. I need your help. ----Disappointed A: Dear xx, As I see it, you have three choices. You can find a new flat for yourself, make him find a new one, or have a talk with him and see if you could both be a little less extreme in your attitudes towards housekeeping. I would suggest you start with the third. Molly B: Dear xx, You could try talking to him about the importance of being on time. If it doesn’t work, one trick you can try is to ask him to set his clock 15 minutes ahead. You could also tell him that something starts 15 minutes or more before it really starts. Molly C: Dear xx, This is a common problem for people of your age. Tell your parents how you feel. Let them know you respect them. Maybe you can make a deal with them. For example, ask them for one day off each week to do what you want to do. Molly D: Dear xx, Next time when he begins talking, you might interrupt him with a smile, saying “That’s interesting, but I hope you understand this is my time to relax. I need to do some reading now.” He may sense your unwillingness and stop talking. Molly E: Dear xx, “Be yourself ” is the best solution. If I were you, I’d tell him to leave me alone. At least tell him, “That was hurtful. Please don’t say things like that to me. I’m a football fan and like watching football games. I can make my own decision.” Molly F: Dear xx, Scores are important for students, but you don’t have to care too much about the result of one test. You are learning. Maybe it is more important to find out why you failed to achieve your goal. Try to do better next time. Molly
【简答题】阅读下列说明和算法,回答问题1和问题2。 【说明】 算法2-1是用来检查文本文件中的圆括号是否匹配。若文件中存在圆括号没有对应的左括号或者右括号,则给出相应的提示信息,如下所示: 文件 提示信息 (1+2) abc) 缺少对应左括号:第2行,第4列 ((def)gx) 缺少对应左括号:第3行,第10列 (((h) ij)(k (1ml) 缺少对应右括号:第5行,第4列;第4行,第1列 在算法2-1...
【简答题】The whole text consists of 25 paragraphs. The following sentences are the main ideas of each paragraph. Please match each of the following main ideas with the appropriate paragraph number of the text....
【简答题】The whole text consists of 25 paragraphs. The following sentences are the main ideas of each paragraph. Please match each of the following main ideas with the appropriate paragraph number of the text....
【简答题】The whole text consists of 25 paragraphs. The following sentences are the main ideas of each paragraph. Please match each of the following main ideas with the appropriate paragraph number of the text....
【单选题】读气压带风带移动规律模式示意图。回答下列问题。 下列各图与上图中P点气候特征相匹配的是()
A.
B.
C.
D.
【简答题】The whole text consists of 25 paragraphs. The following sentences are the main ideas of each paragraph. Please match each of the following main ideas with the appropriate paragraph number of the text....
【简答题】读“我国农村水贫困测度空间格局示意图”,回答下列问题。 小题1:与该空间格局相匹配的是我国 A.水资源的南多北少 B.地势的东高西低 C.人口的东多西少 D.经济水平的南高北低 小题2:造成贵州成为高水贫困地区的最主要原因是 A.气候 B.植被 C.地形 D.土壤
【简答题】Please match each of the syntactic features with their respective functions in English news language.
【简答题】阅读下列说明和算法,回答问题1和问题2。 【说明】 算法5-1用来检查文本文件中的圆括号是否匹配。若文件中存在圆括号没有对应的左括号或者右括号,则给出相应的提示信息,如表5-1所示。 在算法5-1中,stack为一整数栈。算法中各函数的说明如表5-2所示。 【算法5-1】 将栈stack置空,置EOF为false ch←nextch(); while(not EOF) k←kind(ch); if...
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【多选题】第二节: 信息匹配(共5小题;每小题1分,满分5分) 请阅读下列应用文及相关信息,并按照要求匹配信息。请将答案填写在答题卡标号为76-80的相应位置上.注意: E='AB;' F=CD Molly 信箱是一个报刊栏目,主持人Molly 回答读者提出的各种问题. 第1至第5题是五位读者的来信.请从
A.
B.
C.
D.
E.
F中为每封来信选出合适的答复. 76. Dear Molly, I have a problem. My parents are always talking to me about studying. They want me to study harder so I can go to a good school. I know studying is very important, but my parents put too much pressure on me. How can I explain to my parents that I need some free time? ------ Overworked 77. Dear Molly, My best friend Tony is a nice young man, but he has a bad habit. He is always late. No matter where he is going or what he is doing, he is never on time. Once he turned up thirty minutes late for a meeting! What can I do to break him of this bad habit? ------ Worried 78. Dear Molly, I have a new roommate named Louis. He is a good friend of mine, but he is driving me crazy because he is very untidy. He leaves his dirty clothes everywhere, and he never makes his bed. I am extremely neat. What can I do? ---- Unhappy 79. Dear Molly, My cousin plays computer games a lot and he keeps on talking to me about various games. I don’t have any interest at all, but I find it difficult to stop him without hurting his feelings. Would you kindly give me some advice? ----- Shy 80. Dear Molly, I’m feeling upset these days because the result of my last English exam was not as good as I had expected. My teacher comforted me, saying “Don’t worry. You can do better next time.” But I’m still feeling bad. I need your help. ----Disappointed A: Dear xx, As I see it, you have three choices. You can find a new flat for yourself, make him find a new one, or have a talk with him and see if you could both be a little less extreme in your attitudes towards housekeeping. I would suggest you start with the third. Molly B: Dear xx, You could try talking to him about the importance of being on time. If it doesn’t work, one trick you can try is to ask him to set his clock 15 minutes ahead. You could also tell him that something starts 15 minutes or more before it really starts. Molly C: Dear xx, This is a common problem for people of your age. Tell your parents how you feel. Let them know you respect them. Maybe you can make a deal with them. For example, ask them for one day off each week to do what you want to do. Molly D: Dear xx, Next time when he begins talking, you might interrupt him with a smile, saying “That’s interesting, but I hope you understand this is my time to relax. I need to do some reading now.” He may sense your unwillingness and stop talking. Molly E: Dear xx, “Be yourself ” is the best solution. If I were you, I’d tell him to leave me alone. At least tell him, “That was hurtful. Please don’t say things like that to me. I’m a football fan and like watching football games. I can make my own decision.” Molly F: Dear xx, Scores are important for students, but you don’t have to care too much about the result of one test. You are learning. Maybe it is more important to find out why you failed to achieve your goal. Try to do better next time. Molly
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