艇筏配备的原则根据定员、航线、船舶尺度自行确定。（）

PET显像探测的射线是（）

A.β-射线

B.β+射线

C.γ射线

D.α射线

E.X射线

珠江三角洲地区在发展过程中出现的主要问题是

①产业转移日渐加强②重复建设突出③生态环境形势严峻④人地矛盾加剧⑤劳动力素质低[ ]

A．①③④

B．③④⑤

C．②③④

D．②③⑤

There are a great number of people in the world while few people are great.I think there is probably only one great person out of 10，000 at best，and most probably much less than that.

The reason why there are only few of them is that most people do not pay the price of greatness.There are so many people who want to be great，why only very few of them actually pay the price? The answer to the question explains the difference between the almost 100% people who want to be great and the much less than 0.01% who actually be so.The reason is that the road to greatness is full of pains.

Greatness requires sacrifices and there is no sacrifice without pain.The kind of sacrifices required for greatness is the ones that make the process continuously painful for long time.If you only want to be good it may be painful just every now and then，and many people can still handle it.But being great is a total difference.The pain is much deeper and it is continuous，so very few people can endure this kind of pain.Most people naturally choose things that bring pleasures to them.It's unnatural to choose pain over pleasure，let alone doing it continuously for long time.But that's what I believe is the secret to greatness: The secret to greatness is choosing pain over pleasures continuously for long time.

小题1:What is the purpose of Paragraph 1?

A．To compare.　　　　　　　　　

B．To list statistics.

C．To lead up to the topic.

D．To give information.小题2:If one person only wants to be good，what will he/she face?

A．Occasional pains.

B．Continual work.

C．Constant pains.

D．Various difficulties.小题3:What is the main idea of the passage?

A．Pleasures mean greatness.

B．Greatness equals sacrifices.

C．What's greatness.

D．Greatness lies in continuous pains.

婴儿时期腰椎穿刺的椎间隙是

A．胸12～腰1椎间隙

B．腰1～2椎间隙

C．腰2～3椎间隙

D．腰4～5椎间隙

E．腰5～骶1椎间隙

打造北部湾经济区升级版，根本出路在于深化综合配套改革。