题干

家用微波炉是一种利用微波的电磁能加热食物的新型灶具,它主要由磁控管、波导管、微波加热器、炉门、变压器、镇流系统、冷却系统、控制系统、外壳等组成.接通电路后,220 V交流电经变压器变压,在次级产生3.4 V低压交流电对磁控管加热,同时在另一次级产生2000 V高压电,经镇流系统加到磁控管的阴、阳两极之间,使磁控管产生微波.微波输送至金属制成的加热器(炉腔),被来回后射,微波的电磁作用使食物内的分子高频运动,从而使食物受热,并能最大限度地保存食物中的维生素.关于上述微波炉,下列说法正确的是(    )

A:微波是由于原子外层电子受激发而产生的

B:微波是由于原子内层电子受激发而产生的

C:微波炉变压器的低压变压比为1100:17

D:微波炉变压器的高压变压比为17:100000

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C

同类题4

七选五。任务型阅读

    No matter what type of business you run, it has to deal with things that go wrong from your customer's point of view. Complaints can be a great source of information for organizations to make corrections as well as further improvements. ____.

    You should listen actively to what the customer has to say by maintaining comfortable eye contact. ____.

    ____.It's important for you to know that your apology must appear sincere to the customer, and not an empty excuse. And also you should show the customer you've accepted the responsibility and provide him with choices or assure the customer you'll do something about his complaint.

    Talk with the client and discover the best means to resolve his problem. ____ In this case it's important to let your customer know an estimation(估计) of how long it will take to take action on his complaint.

    A simple “thank you” is one way to let the customer know you appreciate the time and effort they've taken to inform you about a problem with your company's service or product that you need to know about.

    Create a procedure for recording different types of customer complaints. ____.

A. Listen to your customer's complaints and you can improve your service.

B. There will be times when you'll be unable to resolve the issue immediately.

C. When receiving a complaint, you should apologize for the failure the customer has identified.

D. They are a valuable source of information to determine various root causes that need to be addressed within your company.

E. So it's important to learn to deal with customer complaints efficiently.

F. Don't feel ashamed of the failure in your service or products.

G. You should also show your customer that you do understand him by giving full attention.