影响肾素-血管紧张素醛固酮系统的药物是：A．依那普利 B．肼屈嗪 C．硝酸甘油 D．

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     Is it true that cats have nine lives? One 4-year-old American cat named Sugar definitely seems to

have more than one. Sugar fell from the 19th floor of her owner's home in Boston last month and was

only hurt a little on her chest.

     "This story isn't much of a surprise," said Jake Socha, a scientist at Virginia Tech University, US, in

an interview with the BBC. "There have been lots of records of these cats surviving."

     Back in 1987, scientists studied 132 cats. All of them had been brought to a vet's clinic in New York

after falling from tall buildings. Around 90 percent of these cats were alive after their fall and only 37

percent had been seriously injured.

      "Being able to survive falls is a critical thing for animals that live in trees, and cats are one of them,"

said Socha.

     Cats have developed special body structures to survive accidental falls. Their legs are muscular. This

can protect their bones from breaking, Professor Andrew Biewener from Harvard University told the

BBC. Cats can also spread out their legs like a parachute to reduce their falling speed, he said.

     The strange part, according to scientists, is that cats have a better chance of survival if they fall from

higher than seven stories. This is because cats have a good sense of which way is down. They can twist

their bodies as they fall to make sure they land on their feet. A higher fall means more time for the cat to

change its body position.

     However, you should not throw your cat out of the window to see how this works. Most pet cats are

overweight nowadays. They are not fit enough to change their position in midair, warned Steve Dale, an

American cat behavior scientist.

     "This cat (Sugar) was lucky," Dale said. In fact, most cats would suffer serious lung damage, a broken

leg or a broken jaw or teeth damage, he said.

1. What can we learn from Paragraph 3?

A. Cats really do have nine lives.

B. Many cats can survive falls.

C. Cats are the softest animals in the world.

D. More than half of the cats that fall from high places end up badly injured.

2. What does the underlined word "critical" mean in the context?

A. Important.

B. Easy.

C. Challenging.

D. Serious.

3. Why can cats survive falls according to the article?

a. They have a hidden parachute in their bodies.

b. Their legs have developed in a way that protects their bones from breaking.

c. They can land on their feet.

d. They can twist their bodies to reduce the speed at which they are falling.

A. a, b

B. b, c

C. c, d

D. b, d

4. Which of the following statements is TRUE?

A. A pet cat that falls out of a tall building is not really at risk.

B. Sugar was lucky that she was only injured in the leg.

C. Cats are confused as to which way is down when they are in midair.

D. A cat that falls from the fourth story of a building is more likely to die than one

     that falls from the 10th story.

Which of the following is least likely to be classified as an opportunity cost()

A. The cash savings related to adopting a new production process.

B. The cash flows generated by an old machine that is to be replaced.

C. The market value of vacant land to be used for a distribution center.

实现当代革命军人核心价值观的根本途径是（）。

A、热爱人民

B、报效国家

C、献身使命

D、崇尚荣誉

唇颊部较小的组织缺损应尽量采用

A．皮管
B．游离复合组织瓣
C．邻近组织
D．游离植皮
E．带蒂或游离的远位组织瓣

原发性肾病综合征典型病例的四大临床特点是（）。

A.大量蛋白尿、低白蛋白血症、全身性水肿、高胆固醇血症

B.高血压、大量蛋白尿、低白蛋白血症、高胆固醇血症

C.大量蛋白尿、肉眼血尿、全身性水肿、高血压

D.高血压、低白蛋白血症、全身性水肿、高胆固醇血症