题干

癌症是威胁人类健康的一类重要疾病。人们对它进行了大量的研究,以下是有关癌细胞结构及生理的描述,你认为正确的是(  )
①每个癌细胞都有数目相同的染色体 ②新陈代谢速度减缓,细胞萎缩 ③每个癌细胞的DNA量不一定相等 ④都具有两个中心体,且分别位于细胞的两极 ⑤在某些病毒的诱导下能产生原癌基因 ⑥细胞内的色素逐渐积累 ⑦失去控制,无限增殖

A:①⑦

B:②④

C:⑤⑥

D:③⑦

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D

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                                                                                          How Not to Do It All

    We all want to do so much: complete our never ending list of tasks and projects, help everyone, travel everywhere, learn a lot of new skills, read every book and watch every good film. ____ There isn't enough time in the day, nor do we have much attention to devote to everything.

    Give up on trying to do it all. ____ It is important for you to make your days count(有价值). How do you do that? Here are some ideas:

    ____ When you eat a good meal, it's wasted if you actually ignore(不理会)it and are reading on your phone instead. It's an amazing meal only if you really enjoy it. In this way, if we enjoy each moment, they really matter.

    Be satisfied. We always want to do more, be more, experience more. And so, we're never satisfied with the little we actually can do and experience. Instead, we should learn to be happy with what we've chosen to do, knowing that we let go of the rest for a reason. ____

    Realize that we're not really in control. The first few items on this list might give you the idea that you can control your life by simplifying…but the reality is that your day will never go as planned. You can try, but there will always be the unexpected, the unplanned. ____ We should learn to appreciate that experience as it comes, whatever it is.

A. Pay attention.

B. That's just how things go.

C. Yet we can't possibly do them all.

D. Put only the best things in each day.

E. Don't try to have the most perfect life you can create.

F. We can accept the reality that is exposed when we let go.

G. We should be thankful for what's actually in front of us and the experience we are given.