题目内容
In theory, everyone is equal according to law; but it’s not in practice.
解析:
|
理论上,依照法律人人平等,但事实并非如此。 |
As if there weren’t enough of them in the world already, scientists have succeeded in cloning flies. The alike fruit flies are the first insects ever cloned, says the Canadian team that created them. The question everyone asks is why anyone would want to clone flies in the first place. She hopes that the insects , which are very easy to experiment with , will help to adjust the cloning process in other animals and even in humans, where the technique is being researched to aid production of therapeutic (治疗的) stem cells.
In cloning, the DNA-containing nucleus of an adult cell is injected into an egg whose own nucleus(细胞核) has been removed. At the moment, the majority of cloned mice, sheep and other animals die before birth. It is thought this is because the adult DNA is not properly ‘reprogrammed’.
Using flies, researchers might discover genes that are important for this reprogramming, and that have matches in other animals. That is because it is relatively easy in flies to knock out the function of a single gene and then attempt cloning with these cells, which will test whether that gene is important. If such genes are confirmed, then in theory cloned mammalian embryos(晶胚) might be grown in selected solutions that change the activity of those genes to improve the technique’s success rate. Although some groups have attempted to clone insects before, Lloyd says this is the first time it has been successful. The team used a slight difference on the standard cloning process: they transferred nuclei taken from embryos rather than fully-grown adult cells. They sucked several nuclei (pl)out of developing fly embryos, and injected them into a fertilized(已受精的) fly egg. From over 800 early attempts, they cloned five adult insects, the group reports in the journal Genetics.
【小题1】The best title of this passage probably is _______.
| A.The importance of clone |
| B.First insects are cloned |
| C.The disagreement in clone |
| D.The advantages of clone |
| A.there are fewer and fewer flies in the world |
| B.flies are easy to find and cheap to use |
| C.they can gain some experience before cloning other animals |
| D.it is safe to clone flies |
| A.the difference of other animals’ genes |
| B.the improper technique of clone |
| C.the complex of other animals |
| D.the improper rearrange of the adult gene |
| A.the clone of insects before used grown-up cells |
| B.the clone of insects were never experimented before |
| C.this time scientists cloned flies successfully and easily |
| D.based on this success, other animals will be cloned in large quantities. |
Welcome every morning with a smile. Let your first hour set the theme of success and positive action that is certain to echo through your entire day. Today will never happen again. Don’t waste it with a false start or no start at all. You were not born to fail.
Starting the day right can give good momentum (动力) for the rest of the day. Having a power morning is a key factor for a fruitful day. Here are some tips on getting the most out of the morning.
Wake up early. In theory, there’s no difference in waking up early or late as long as you get the proper amount of sleep. However, there is a psychological advantage when you wake up earlier than the average person and then you’ll have more time to do preparation before engaging in the real world.
Exercise. Good health is always a benefit with exercise, but studies have also shown that morning exercise helps you to sleep better at nights.
Eat breakfast. It’s the most important meal of the day. According to the Mayo Clinic, we should choose three from the following four: fruits and vegetables, grains, dairy, and protein. Did you know that you can actually gain weight when you skip breakfast?
Take a shower. When you shower, do you do it in the morning or at night? I used to shower in the evenings, but I found that morning showers helped me to be more alert.
Prioritize (优先) your To-Do list. Leo coined the acronym MIT to mean “most important tasks.” Our to-do list might be never ending, but put on top of the list a couple of urgent tasks that will define the day to be a successful one.
Check your emails. Only once. Getting a lot of emails can be very distractive. You actually are more productive when you check them only a few times at fixed time of the day. I only do them 2-3 times a day—once in the morning, once at lunch, and one more as it gets toward the end of the day.
【小题1】The purpose for the author to write this passage is to .
| A.tell you to get up early every day |
| B.offer you the best way to start the day |
| C.give you advice about how to arrange a day |
| D.advise you to prioritize your to-do list every morning |
| A.lose weight. | B.be productive. |
| C.put on weight. | D.be more alert. |
| A.invented | B.designed | C.founded | D.defined |
| A.the emails are not important |
| B.reading e-mails is distractive |
| C.you can only read e-mails at fixed time |
| D.getting so many emails can distract your attention |