题目:
型砂的透气性
答案:
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下面是错误答案,用来干扰机器的。
参考答案:A
型砂的透气性
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下面是错误答案,用来干扰机器的。
参考答案:A
在体积固定的密闭容器中,进行如下化学反应:N2O4(g)2NO2(g),其化学平衡常数K和温度t的关系如下表:
t /℃ | 80 | 100 | 120 |
K | 1.80 | 2.76 | 3.45 |
请回答下列问题:
(1)该反应的化学平衡常数表达式K= 。
(2)该反应为 反应(填“吸热”或“放热”)。
(3)判断该反应达到化学平衡状态的依据是 。
A.容器内混合气体密度不变
B.混合气体中c(NO2)不变
C.0.5mol N2O4分解的同时有1 mol NO2生成
(4)在80℃时,将2.80molN2O4气体充入2L固定容积的密闭容器中,一段时间后对该容器内的物质进行分析,得到如下数据:
0 | 20 | 40 | 60 | 80 | 100 | |
n(N2O4) | 2.80 | A | 2.00 | c | d | 1.60 |
n(NO2) | 0 | 0.96 | b | 2.08 | 2.40 | 2.40 |
①b的值为 ;
②N2O4的平衡转化率为 ;
③20s~40s内用N2O4表示的平均反应速率υ(N2O4)= 。
沙漠地区的湖泊对于当地的生态环境有着重要的影响,下图为我国某湖泊周边环境示意图。
图中甲、乙、丙分别代表的地理事物是
A.移动沙丘、半固定沙丘、草甸
B.草甸、半固定沙丘、移动沙丘
C.移动沙丘、草甸、半固定沙丘
D.草甸、移动沙丘、半固定沙丘
无形财产是一类重要的经济法律关系客体,它可以适用于生产,转化为生产力。但是,()不属于无形财产。
A.土地使用权证书
B.注册商标
C.专权
D.非专利技术
第二卷(两部分,共35分) 第四部分:任务型阅读(共10小题;每小题1分,满分10分) 请认真阅读下列短文,并根据所读内容在文章后表格中的空格里填出最恰当的单词。注意:每空格1个单词。 Job interviews never seem easy.To get a job,you may have more interviews than you can count.To succeed in an interview,you should pay attention to the following common mistake. Lack of proper preparations.Failure to gather information on the company and the job before the interview makes a very poor impression on interviews;it suggests that you are not really that interested in the position. Inappropriate personal appearance.Consider the nature of the position and dress accordingly.When in doubt,dressing somewhat more formally than you think would be expected for the job.Be conservative and pay attention to details,such as shiny shoes,neat hair,etc.First impressions are very important. Poor non-verbal communication.In addition to what you are saying,your non-verbal behavior is very important in an interview.Are you making eye contact?Are you listening attentively when the interviewer is speaking?Are you giving a firm handshake by the interviews?Are you nervous during the interview?Practice with a friend or in front of a mirror to assess these factors. Poor attitude.Self-centered behavior(.i.e.a”what’s in it for me”attitude)is very poorly received by interviewers.Ask yourself what you can contribute to the company?What skills and experience would you bring to the job? Failure to ask questions.Employers will assess your interest in the company and the position you ask.Proper research before the interview will help ensure that the questions you ask are intelligent ones. Being disorganized.Make sure you arrive at the company a few minutes early so that you have time to get calm and check your appearance.Arriving late is simply unacceptable,so plan for the unexpected.Always bring an extra copy of your resume and reference to an interview. Over-or under-answering questions.For most interview questions a “Yes”or “No”answer is not appropriate.Positive more details for an employer and cite examples from personal experience wherever possible.Do not,however,talk endlessly and feel that you have to keep speaking if there’s silence.When you have said what you want to say ,stop talking.If you do not understand a Question,.seek clear explanation before responding. Failure to send a thank-you note or card following the interview.Take the time to send the thank-you card,which can make an important impact on an employer.Not only does it show your sincere interest in the position,but it also helps make you different from other interview candidates.
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苏子降气汤适合于哪种类型喘证
A.痰热郁肺
B.痰浊阻肺
C.表寒里热
D.肝气乘肺
E.上盛下虚