The team found that the reproductive_____of tropical insects tends to peak

A．confirmed

B．expectant

C．useful

D．interested

As a result of their experiments, Dr. Corsi\'s team found that_________

A．dishwashers are very efficient machines

B．indoor pollution rivals outdoor pollution

C．tap water is as polluted as bottled water

D．gas masks are a useful protective device

What do we learn about the five germplasms Tommy Carter's team found？

A．They produce the same yield in different locations.

B．They are suitable to grow only in the United States.

C．They produce better quality soybeans under dry weather.

D．They have better production under drought conditions.

The passage implies that______.

A．it is not easy to persuade manufacturers to adopt the new design

B．the team of engineers has not found any countermeasures

C．children like to ride bicycles at a very low speed

D．a lot of children were killed in bicycle accidents in the past 30 years

The passage implies that ______.

A．it is not easy to persuade manufacturers to adopt the new design

B．the team of engineers has hot found any countermeasures

C．children like to ride bicycles at a very low speed

D．a lot of children were killed in bicycle accidents in the past 30 years

The passage implies that

A．it is not easy to persuade manufacturers to adopt the new design.

B．the team of engineers has not found any countermeasures.

C．children like to ride bicycles at a very low speed.

D．a lot of children were killed in bicycle accidents in the past 30 years.

We can know from the passage that______.

A．the reason why aging takes a greater loss on the male heart has been found out

B．scientists are on the way to find out why the male heart loses more of the cells

C．the team has done something to prevent the male from suffering the greater loss

D．women over 70 could lose more heart cells than those at the age of 20

A.30.

B.35.

C.5.

It is doubtful that there was a more successful comedy team in the 20th century(1)the Three Stooges. Larry, Moe, and Curly became famous for their many short movies(2)extraordinary comedy. In their movies, they found many ways of(3)funny actions. They attracted large audience and received a lot of(4). However, their movies also(5)criticism. Some people who didn't like the Three Stooges(6)they were too violent. In a TV interview Moe and Larry were roused to(7)themselves. Their coarse brand, they said, shouldn't be taken(8). It was just "cartoon violence".

The Stooges got their name and their start in an act(9)Ted Healy and His Stooges. This act began(10)the way for their exceedingly successful career.(11), the team was composed of Larry, Moe and Shemp.(12), Shemp left for a career in more serious movies. When Shemp left, Curly took his(13). Shemp's clumsy character returned in 1946 after Curly(14)a stroke.

Moe was the heart and soul of the team, acting as(15)their main comic force and their director. He was responsible(16)scripting many of the jokes. He'd also spend time providing his services as their business manager. In 1934 the team began a series of comedy shorts that numbered more than 200(17)they ceased in 1958,(18)won them numerous fans.(19)all the criticism, the Three Stooges are undoubtedly the most famous comedy team that history.(20)invented.

Why Humans Walk on Two Legs

A team of scientists that studied chimpanzees (黑猩猩) trained to use treadmills(跑步机) has gathered new evidence suggesting that our earliest apelike ancestors started walking on two legs because it required less energy than getting around on all fours.

Michael Sockol, researcher of UC Davis, worked for two years to find an animal trainer willing to coax (劝诱) adult chimps to walk on two legs and to walk on ail fours.

The five chimps also wore face masks used to help the researchers measure oxygen consumption. While the chimps worked out, the scientists collected data that allowed them to calculate which method of locomotion (移动) used less energy and why. The team gathered the same information for four adult humans walking on a treadmill.

The researchers found that human walking used about 75 percent less energy and burned 75 percent fewer calories than quadrupedal and bipedal walking in chimpanzees. They also found that for some but not all of the chimps, walking on two legs was no more costly than on all fours.

"We were prepared to find that all of the chimps used more energy walking on two legs -but that finding wouldn't have been as interesting," Sockol said. "What we found was much more telling. For three chimps, bipedalism was more expensive, but for the other two chimps, this wasn't the case. One spent about the same energy walking on two legs as on all fours. The other used less energy walking upright." These two chimps had different gaits (步法) and anatomy (解剖) than their quadrupedal peers.

Taken together, the findings provide support for the hypothesis that anatomical (解剖学的) differences affecting gait existed among our earliest apelike ancestors, and that these differences provided the geneticvariation which natural selection could act on when changes in the environment gave bipeds an advantage over quadrupeds.

Fossil and molecular evidence suggests the earliest ancestors of the human family lived in forested areas in equatorial Africa in the late Miocene era (中世纪) some 8 to 10 million years ago, when changes in climate may have increased the distance between food patches. That would have forced our earliest ancestors to travel longer distances on the ground and favored those who could cover more ground using less energy.

"This isn't the complete answer," Sockol said. "But it's a good piece of a puzzle humans have always wondered about: How and why did we become human？ And why do we alone walk on two legs？"

Michael Sockol and his team were interested in

A．where humans came from.

B．how chimpanzees could be trained to use treadmills.

C．why our apelike ancestors came to walk on two legs.

D．when our earliest ancestors began to live in forested areas.