下图表示利用某种农作物①和②两个品种分别培育出④、⑤、⑥三个品种的过程.根据上述过程

根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

As we know, sport is very common in our daily life. People who usually compete in sports can be found everywhere. Why so many people love sports? __1__

Generally speaking, it is good for our health to do sports, such as basketball, football, table tennis, swimming, badminton, and so on. __2__ I have taken the swimming course this term, since I didn’t know how to swim. I find that swimming is very interesting and has many benefits for our bodies. On one hand, it can make our blood circulatory system run regularly. On the other hand, the muscles of our bodies can be massaged(按摩) under the pressure of water. All these are positively advantageous to our health.

__3__ It is known to us that some sports are team sports that involve several players or even more. When playing with others, people must face the situation of getting along with others. Through the sport games, strangers may go easily with others and make friends with each other. __4__ If you don’t know what to do, doing exercises may be a good idea because you can share the time and the fun with your friends.

__5__Yes, that’s right. But the advantages of sports are more than its disadvantages. We should follow the lead of sports athletes, as sports play an essential role in our life. Plenty of physical exercise will help you keep fit.

A．I think I love the sports deeply.

B．Just take swimming for example.

C．There are many reasons for this.

D．I like the sports, which is interesting.E. Besides, sport is also a way of communication.

F. Some people may say it is easy to be hurt while having sports.

G. What’s more, they can get satisfaction from the competitive sports.

把6米长的钢管平均截成9段，每段占全长的几分之几？3段占全长的几分之几？每段长多少米？

汽车综合性能检测站的服务功能有哪些？

国家或政府的公共管理活动是随社会经济的发展而变化的。( )

下列各项中不属于润滑油优点的是（）。

A.减少摩擦

B.加速机件磨损速度

C.冷却

D.防锈