题干

关于如右图的叙述不正确的是(   )

A:因为细胞中无细胞壁有中心体⑨,所以可以判定该细胞为动物细胞

B:④是一条染色体,包含两条染色单体①和③,它们通过一个着丝点②相连

C:细胞中含有两对同源染色体,其中④和⑦为一对同源染色体

D:在后期时,移向同一极的染色体均为非同源染色体

上一题 下一题 0.0难度 选择题 更新时间:2017-04-03 01:59:30

答案(点此获取答案解析)

D

同类题2

阅读理解

    People are seeking for opportunities that will assist them in reaching their goals. Marketing yourself can be a good choice, which can help you achieve your goals. Though when people talk about marketing, they usually think that this is about producing a sale, it does not necessarily have to be.

    If you are an employee then you want your boss to take your ideas, and if you are on a job hunting then you want to find a good position. So in reality, marketing really leads to sale. So marketing yourself means you are simply “selling” yourself!

    The common problem in marketing yourself is that most people think that it is unpleasant to market themselves. They think that marketing concerns only to a business. Of course, this is absolutely not true. People who want to attain the success they desire must promote themselves.

    Marketing yourself is a useful tool. The better you market yourself, the more opportunities you will have. Marketing yourself does not really mean telling every person how beautiful and wonderful you are. It means letting your prospective employer know that you exist or you can do something better.

    There are actually several different ways of marketing yourself. But there are only two primary ways that you carry out. The first is to find ways to reach out to others and the second is to construct ways in order for the people to find you and make connection with you.

    To reach out and touch the lives of others, you have to be a good person and a good employee. In that way your good reputation will follow naturally. Have a brief and concise message that you can share with others. When you market yourself, you tell people who you are and what you can do for others. Plan well and practice your message.

    In constructing ways for the people to notice and make connection with you, you must be open to them. Communication is a great opportunity to make an impact especially when you market yourself. You also communicate by what you are wearing. Know the appropriate dress code and have plenty of time to decide what you will wear. Just remember to make a great first impression!

同类题3

任务型阅读

    Christmas is a time for relaxing, having fun and spending time with family and friends.____It can be difficult to find the motivation for study when everyone around you is having so much fun. So, here are my top five tips for revising effectively over the Christmas break.

    Set aside a few hours a day to revise.

    Find the best time to revise and make sure that you stick to your timetable! For example, I find that I work best in the morning.____

Plan something fun to do every day.

    Even if it's just going for coffee with a friend or watching a film at home, this will give you something to look forward to and motivate you to finish your revision.

    Explain to your family why your revision is important.

    ____So, make efforts to tell them why your exams are important. Perhaps you can agree to do something nice with them when your exams are over.

    ____

    It is important to take some time to relax. When you do get back to revising, you'll probably find it easier to concentrate. Pick the most important days for you and your family to concentrate on celebrating Christmas!

    Remember that it won't last forever.

    You might have to spend your Christmas revising this year, and perhaps for a few more years, but soon enough you'll be free of exams forever.____Have a great Christmas and make sure you find a balance between studying and celebrating. Good luck in your exams!

A. Spare your time for your family.

B. Make sure that you take a few days off!

C. So I get up fairly early and do a few hours of revision.

D. Sometimes it can be difficult for family to understand you.

E. However, for many of us, it is also time to prepare for January exams.

F. Otherwise, you may probably fall into trouble with your friends and family.

G. And after spending time revising, your future Christmases will seem even better!