20世纪70年代，在世界新发现的大油田中，海上油田有31个，约占51_爱下问搜题

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问题单项选择题

20世纪70年代，在世界新发现的大油田中，海上油田有31个，约占51.7%，在新增加的地质储量中，海洋占42%，海上钻井平台总数为7021座，其中美国有1079座，委内瑞拉有5033座，苏联有840座。1977年，近海油田有500个，产量4.6亿吨，占世界总产量的15.6%。

20世纪70年代非近海油田数可能是（）。

A．多于500个

B．少于500个

C．等于500个

D．不能确定

答案

参考答案：D

解析：

文字段中没有提到，故无法判断。

完形填空

One day, a well-known speaker was invited to give a lecture to an audience of 200. He started his lecture by       a $ 20 bill. He looked around the room, and asked, “Who would like this $20 bill?”      started going up.
He said, “I am going to       this $20 to one of you, but first, let me do this.” He crumpled up (揉皱) the 20-dollar bill. He then asked, “Who       wants it?” Still the hands were       in the air.
“Well”, he replied,“    I do this ?” And he dropped it on the       and started to step on it with his shoes. He picked it up. Now it was crumpled and       .
“Now, who wants it?” Still the hands went into the air.
“My friends, we have all learned a very       lesson. No matter what I did to the       , you still want it because it doesn’t decrease in     . It is still worth $20, with       we can buy what we need.
Many times in our lives, we are     , and trampled underfoot by the decision we      and the circumstances that come our way. We feel     we were worthless. But no matter what has happened or what may happen to us, you will never       your value. Dirty or clean, you are still priceless to those who do love you. The worth of our lives is determined not by       we do or who we know, but by who we are. You are      . Don’t ever forget it.”
If you       this lesson in mind, it will help you to       again when you fall. Each time it makes you grow much stronger.

D．bringing up

A．meaningless

B．even though

单项选择题

尸肾移植，供受体间HLA配型要求至少几个点相配（）。

A.一个

B.二个

C.三个

D.四个

E.五个