题目内容
BDo you often feel tired latelyHave a doctor said he can’t find anything wrong with youPerhaps he advises you to take a physical examination,but all the advanced（高级的）equipment shows that there is nothing wrong with you.Then,consider this:You might be in a state of sub-health.Sub-health,also called the third state or grey state,is explained as a borderline state between health and disease.Experts have found out that people who work in management positions as well as students around the exam-week are more likely to suffer sub-health.They may feel depressed,anxious or under stress.Sub-health symptoms（症状）are a lack of energy,depression,slow reactions and poor memory.Some other symptoms may include shortness of breath,sweating and aching in the waist and legs.According to some medical experts,the key to preventing and recovering from sub-health is to form good living habits,alternate（结合）work and rest,exercise regularly,and take part in open-air activities.As for meals,people are advised to eat less salt and sugar.They should also eat more fresh vegetables,fruit and fish because they are rich in nutrient elements that are important to the body.Experts also point out that it is not good to eat too much at one meal because it may cause unhealthy changes in the digestive（消化）system.They also say that a balanced diet is very helpful in avoiding sub-health.The last but not the least,the help and understanding of family and friends are especially important.Sometimes life can become very much difficult to cope with.Then more help may be needed. Sub-health is a kind of（）.
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并联型晶体振荡器中，石英晶体起（）作用。
---Your teacher might find out about it.---（）?I’m doing nothing that breaks the rules.
Dear students,When the time comes to leave school,you need to decide what you want to do.If you want to start working,you need to think hard about your vocation.Apart from regular employment,you could also consider going on a work placement or entering an apprenticeship(学徒).Next,you need to look for a job.It is often said that this is a full-time job in itself.Buy some local newspapers and pick up a copy of Recruit from any MTR station or bus stop.Read through all the job advertisements.You can also check career websites,such ashttp://www.hzhr.com.cn.To apply for the jobs,you need to write a CV and send it along with your covering letter to the address in the advertisement in your CV,you are to include personal information,such as your name and contact details.Details of your academic qualifications and work experience must also be given.Your CV should be clearly organized and well presented.In your covering letter,you are to state the position you are applying for,where you saw the advertisement and why you think you are a suitable candidate(候选人).Remember to be polite and formal,and follow the standard rules for writing a formal letter.Before your interview,you need to do some preparations.Look at the company’s website,if they have one,to find out a bit more about the company.Think of a couple of questions to ask the interviewer.For example,you may want to ask whether a new employee is assigned a mentor(分配一个师傅)or whether training courses are provided.Also,think of answers to questions you may be asked,such as“What are your shortcomings?”On the day of the interview,dress neatly and formally.At the interview,be friendly and polite,and most importantly,be yourself.Work hard,never give up and your dreams will come true.I wish all school leavers the best of luck for the future.Best wishers,Linda BerryChief Careers Advisor “It is often said that this is a full-time job in itself.”(Paragraph 2)Here“this”refers to（）.
锁相环是一个（）控制系统，它的基本原理是利用（）误差去消除（）误差，从而实现对输入信号频率的跟踪。
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