下列描述中，是异构化催化剂性能参数是（）。A、乙苯转化率 B、C8A收率 C、催化剂

Of all the animals in the animal kingdom, which one (aside from man) is the cleverest?

There are several ways of measuring the intelligence of animals. In one test a scientist sets three same cans on a table. While the animal watches, he puts food under one of the cans. Then he leads the animal away. Some time later, he brings it back to see if it remembers which can has the food. No smelling is allowed; the animal must go directly to the correct can or it fails.

This is called a delayed- response text. The idea is to find out how long an animal’s memory can keep information. The scientists would try showing the cans to the animal one hour later, or two hours later, or even a full day later. They discovered that chimpanzees and elephants had the best memory, and were able to remember the correct can for at least twenty hours. No other animal is close. Dogs came next, but they only remembered for nine hours.

To settle the matter, the scientists designed a huge maze (迷宫) and ran the chimps  and elephants through it. The maze was very difficult, with many blind paths and dead ends. It took the chimps (chimpanzees) ten minutes to find their way out. The elephants needed half an hour. Even allowing for the elephants’ slower rate of speed, the test shows that chimpanzees are the cleverest animals.

From this and other tests, the scientists drew the following conclusion: an animal’s intelligence depends on the size of its brain in proportion (比例) to the size of its body. The elephant’s brain weighs ten pounds. But this is only 1/600^th of its 6,000 pounds body. A chimp’s brain weighs about one pound, or 1/120^th of its total body weight. So in proportion to its body size, the chimp has four times as much brain as the elephant----more brain for less body. The chimp is the champ!

小题1:Which is the best title ?

A．The Elephant’s Memory

B．The Cleverest Animal

C．Judging Intelligence

D．The Chimp’s Brain小题2:The main idea of this passage is that ________.

A．there are several ways of measuring the intelligence of animals

B．chimps and elephants have the best memory

C．intelligence tests show that the chimp is the cleverest animal

D．the scientists designed a huge maze and ran the chimps and elephants through it小题3:The delayed-response test is designed to test an animal’s________.

A．eyesight

B．intelligence

C．learning ability

D．memory小题4:The passage tells that elephants ________.

A．never forget things

B．are more clever than chimps

C．are slower-moving than chimps

D．have better memories than chimps小题5:According to the passage, a rhinoceros (犀牛) that weighs 2100 pounds, and has a 3-pound brain is

________.

A．as clever as a chimp

B．more clever than an elephant

C．less clever than an elephant

D．as clever as an elephant

急性高侧壁心肌梗死

A．I、aVL导联ST段弓背向上抬高
B．Ⅱ、Ⅲ、aVF导联ST段弓背向上抬高
C．V₁、V₂、V₃导联ST段弓背向上抬高
D．V₅、V₆导联ST段弓背向上抬高
E．多导联ST段弓背向下抬高

国际直接投资对资本输出国的贸易效应主要体现在四个方面，分别是（）

A.出口引致效应

B.出口替代效应

C.反向进口效应

D.进口转移效应

E.进口替代效应

甲、乙都是某公司职员。2007年春，公司派甲到珠海办事处工作一年。临行前，甲将已使用于一年的一台21英寸彩电委托给乙保管并允许其使用。一个月后，甲给乙写信说自己买了一台进口彩电，委托其保管的彩电可以适当价格出售。同单位的司机丙知道此事后，对乙表示想以低价购买，并嘱乙给甲写信说该电视机显像管有毛病，图像不清，以便使甲降价出售。乙考虑到丙经常给自己免费送东西，便按丙的意思给甲写信。甲回信说显像管有毛病可以低价出售。于是，丙以500元的价格买下该电视机，后丙又很快以2000元的市价将电视机卖给丁。事隔一月，丁将电视机作为嫁妆送给其妹。

本事例中，谁对电视机具有所有权( )。

A．甲

B．丙

C．丁

D．丁的妹妹

基本的车身电控系统有开环控制与闭环控制之分，它们最根本的区别在于。（）

A.传感器

B.控制器

C.执行器

D.反馈装置