如图所示,空间存在两个磁场,磁感应强度的大小均为B,方向相反且均垂直于纸面,MN

题型:实验题

问题:

如图所示,空间存在两个磁场,磁感应强度的大小均为B,方向相反且均垂直于纸面,MN、PQ为其边界,两边界相距l。边长也为l的正方形闭合导线框abcd在外力作用下,以速度v匀速向右运动,规定线框中的电流顺时针方向为正方向,在i--t图像中画出图示位置起感应电流随时间变化的示意图。

考点:电磁感应现象中的切割类问题
题型:实验题

下列离子方程式正确的是[ ]

A.乙酸与碳酸钠溶液反应:2H++CO32- == CO2↑+H2O

B.醋酸溶液与新制氢氧化铜反应:2H++Cu(OH)2→Cu2++2H2O

C.苯酚钠溶液中通入少量二氧化碳:2C6H5O+CO2+H2O→2C6H5OH+CO32- 

D.甲醛溶液与足量的银氨溶液共热 HCHO+4[Ag(NH3)2]++4OHCO32- +2NH4+ +4Ag↓+6NH3+2H2O

题型:实验题

When you need a job very much, you may end up taking one for which you are over qualified. Although you were initially grateful just to have the work, you now feel bored and depressed. Is there any way to change that?

Start by changing your opinion, says Caitlin Kelly, the author of Malled, a book based on her experience as a sales clerk after losing her job in journalism. “Don’t focus on what you’re not getting but what you are getting,” she says. “Be patient and work attentively with a wide range of people. It doesn’t matter what the job is –there are always things you can learn and skills you can develop.”

Hilary Pearl, the founder of a coaching firm, says, “Tell yourself the current situation isn’t the end of your career. Don’t overdramatize(过分夸大)the negative aspects but try to view the situation more philosophically: life has a series of stages, and this is one of them. Don’t forget to study even in the worst stage.”

Consider that because you’re overqualified, you may be able to learn or do things on the job that might not have been possible in a more demanding position, says Sarah Hathorn, the chief executive of Illustra Consulting. “You could spend your extra time in learning different aspects of the business and teaching others in the organization,” she says.

Is it possible to make your work more challenging, even if your job responsibilities aren’t likely to change?

Of course, you may seek tasks and responsibilities that force you to learn something new or to work harder. “You may be operating on autopilot(习惯性地)right now, but chances are that people above you are stressed,” Sarah Hathorn says. “Take things off your boss’s plate and let him know which projects or tasks you want to learn more about.”

Always express your request positively, saying that you love new challenges, rather than complaining that you’re bored and underused, says Ethun, the president of the Park Avenue Group. In your down time, educate yourself about the company and its industry. “Read corporate information, analyst reports and related news articles,” she says. “If your boss accepts your suggestions, it will make you a more valuable employee.”

小题1:According to Caitlin Kelly, ______.

A.one should be willing to do some small things

B.being a salesman is not as important as being a journalist

C.performing your regular duties well is important

D.doing a simple job well will bring you a sense of success小题2:What Hilary Pearl intends to express is that ______.

A.work is just a stage of our whole life

B.the present job doesn’t matter to us in a long run

C.one should be satisfied with his present situation

D.one should look forward instead of complaining about the present situation小题3:The underlined words “take things off your boss’s plate” mean______.

A.draw your boss’s attention

B.share your boss’s burdens

C.give your boss useful advice

D.ask your boss for a better position小题4: What is the common view about careers of the people mentioned in this passage?

A.One should start his career from doing a simple job.

B.One should improve himself and help others as well.

C.One should keep learning new things to improve himself.

D.One should pay much attention to the relationship with the boss.

题型:实验题

缺铁性贫血的治疗原则是()

A.健脾益气,滋生化源

B.健运脾胃,益气养血

C.补血养心,益气生血

D.滋养肝肾,益精生血

E.培补脾肾,化生气血

题型:实验题

可用于治疗抑郁症的药物是()

A.五氟利多

B.舒必利

C.奋乃静

D.氟哌啶醇

E.氯氮平

题型:实验题

联结现实世界到数据世界的纽带是()

A.坐标

B.关系数据

C.空间数据编码

D.关系模型

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