题干

等差数列首项,公差,当时,序号等于(  )

A:96

B:99

C:100

D:101

上一题 下一题 0.0难度 选择题 更新时间:2020-01-15 09:53:19

答案(点此获取答案解析)

C

同类题1

任务型阅读

    Like it or not, there will be difficult times in our lives. You might lose your job, fail in your exams or have an illness.____Here are some ways not to lose hope during difficult times.

    ⒈Have faith.

    ____No matter how bad the situation is, things will turn out to be good in the end. Several years ago I failed to get my master's degree. It was a really bad experience.____It was of much better quality than my previous university. Experiences like this strengthen my belief that having faith is important during difficult times.

    ⒉Be around supportive people.

    Going through difficult times is hard, and going through them alone is even harder. You need a group of positive people who can support you.____If you don't, my suggestion is to start looking for one. Don't wait until you need it, because it will be too late by then. You need the community before difficult times come.

    ⒊Help others.

    An additional benefit of being in a good community is that it encourages you to think about other people. It pushes you to help others and, therefore, think about other people ____As a result, your situation won't look as bad as it would be otherwise. Often the situation looks worse than it really is because we give too much attention. Shifting (移开) some of your attention away will put the situation in a better view.

A. Your community helps a lot.

B. Whatever it is, it's important not to lose hope.

C. I changed my attitude towards failure.

D. In this way you take your focus away from yourself.

E. But I got a scholarship at an overseas university later.

F. You must believe that things will work out well eventually.

G. You should become part of a community that cares for one another.

同类题3

阅读理解

Tips for Cycle Trips

       Cycling has many advantages as a form of travel, as it is the fastest way to travel by human power and slow enough to allow the type of local involvement that is impossible with powered travel.Cycle travel is a cheap form of transportation.

       Distance

      On level terrain(地形),without a headwind, a cyclist of average fitness on a touring bike can comfortably cover 60­120km a day.Distances of up to 250km a day are possible, but anything much beyond 120km will require considerable physical tension and not allow many stops to enjoy the places you visit.For many,80­100km a day will be the most suitable distance to aim for, as it will give a sense of achievement and also leave plenty of time for meals and activities.

       Geography

       The gradient(坡度)of the trip will reduce your range.A basic rule is that for every 100 meters of altitude you climb, you should add an extra 15 minutes to your journey time.In hilly or mountainous areas, the easiest routes for cycling are downstream along major rivers, as overall they will be downhill.A long, roundabout route along a river will usually be easier than a short, direct route over a hill or mountain pass.However, it is worth bearing in mind that the most scenic routes often come from hilly terrain.

      Eat

      Food choice depends largely on where you are, so see the respective sections for more information about foods. As you will be working hard, it's important to get enough energy in your food. On long trips away from major towns­there may be little quality food available, so be prepared to live on candy bars, prepared meat products and the like if the need arises.

      Sleep

      While you can take a tent with you, many hotels and especially campsites can accommodate cyclists. However, there are also some hotels that may be less used to accommodating cyclists. If you are exploring an unfamiliar world asking about the accommodation spares you the search for a new place to stay after a long exhausting day of travel.