What good news! Such a successful gene ______...

What good news! Such a successful gene ______ in pigs that it enables the pigs to produce human serum albumin, a protein made by the liver. Look! Here ________.

A. have they modified…they come.

B. did they modify…come they

C. they have modified…are coming they

D. they modify…they are coming

高三英语单项填空中等难度题查看答案及解析

My teacher often says that success in making money is not always a good ______ of success in life.

A. belief　　 B. element　　 C. criterion　　 D. instance

高三英语单项填空中等难度题查看答案及解析

What do you get when you mix six little pigs, four monkeys and the deadly Ebola virus? Bad news, according to a recent experiment by Canadian researchers.

The experiment is the first to suggest that the Ebola virus can spread through the air. The study, published in November, detailed how the virus apparently moved from pigs to monkeys without their coming into physical contact. Previously, researchers thought animals had to touch to pass along the virus, which has been blamed for the deaths of more than 1,500 people.

In the experiment, researchers infected six piglets with Ebola. The team then placed the infected piglets in a room with several monkeys. A barrier separated the monkeys from the pigs, so the two species could not touch. And yet, after about a week, two monkeys became sick, infected with the virus. A few days later, the other two monkeys also fell sick with Ebola.

The Ebola virus is named for a river in the Democratic Republic of the Congo in Africa, close to where the germ was discovered. The virus causes high fevers and deadly bleeding disorders in primates, including people and monkeys. It is often deadly. However, scientists previously believed that the virus spread only through direct contact with the blood or other body fluids of an infected person or animal. Other viruses, including the ones that cause chicken pox and the common cold, are known to spread through the air.

Though Ebola too appeared to spread through the air in the laboratory experiment, researchers haven’t documented any cases of airborne infection under normal conditions. Since the discovery of Ebola in 1976, it has infected more than 2,200 people. Of that total, only 13 people fell ill apparently without coming into direct contact with an infected animal or person. If Ebola spreads easily through the air, scientists and doctors would expect to see more such cases.

1.What does the underlined part “Bad news” in Paragraph1 refer to?

A. The animals will only spread the virus to other animals.

B. Canadian researchers have not reached a conclusion.

C. The virus will be spread among people by pigs and monkeys.

D. The pigs and monkeys will get infected with the virus.

2.What have researchers surprisingly found about the Ebola virus recently?

A. The Ebola virus can be deadly to animals in the wild.

B. The Ebola virus can spread without direct physical contact.

C. The Ebola virus can kill humans after they get infected with it.

D. Animals have to touch each other to pass along the Ebola virus.

3.What do we know about the Ebola virus?

a. It was first found in an African country.

b. It spreads totally differently from chicken pox.

c. It cannot spread through other body fluids besides blood.

d. People usually suffer from high fevers after getting infected.

e. It spread only through direct contact with the blood in the past.

A. abe　　 B. ad　　 C. abc　　 D. bcde

4.It is implied about the Ebola virus in the last paragraph that ___.

A. it has killed thirteen people in total through air spreading

B. it cannot cause any human infections under normal conditions

C. spreading through the air is not an efficient route of transmission

D. more than 2,200 people have died because of the infection of the virus

高三英语阅读理解中等难度题查看答案及解析

It wasn’t such a good present ________my cousin had promised me.

A. that           B. as           C. which          D. what

高三英语单项填空中等难度题查看答案及解析

After the violent earthquake that shook Los Angeles in 1994, earthquake scientists had good news to report: The damage and death toll （死亡人数） could have been much worse．More than 60 people died in this earthquake．By comparison, an earthquake of similar intensity that shook America in 1988 claimed 25,000 victims．

Injuries and deaths were relatively less in Los Angeles because the quake occurred at 4:31 a．m．on a holiday, when traffic was light on the city's highways．In addition, changes made to the construction codes in Los Angeles during the last 20 years have strengthened the city's buildings and highways, making them more resistant to quakes．

Despite the good news, civil engineers aren't resting on their successes．Pinned to their drawing boards are blueprints （蓝图） for improved quake-resistant buildings．The new designs should offer even greater security to cities where earthquakes often take place．

In the past, making structures quake-resistant meant firm yet flexible materials, such as steel and wood that bend without breaking．Later, people tried to lift a building off its foundation, and insert rubber and steel between the building and its foundation to reduce the impact of ground vibrations．The most recent designs give buildings brains as well as concrete and steel supports．Called smart buildings, the structures respond like living organisms to an earthquake's vibrations．When the ground shakes and the building tips forward, the computer would force the building to shift in the opposite direction．

The new smart structures could be very expensive to build．However, they would save many lives and would be less likely to be damaged during earthquakes．

1.One reason why the loss of lives in the Los Angeles earthquake was comparatively low is that __________．

A．new computers had been installed in the buildings

B．it occurred in the residential areas rather．than on the highways

C．large numbers of Los Angeles residents had gone for a holiday

D．improvements had been made in the construction of buildings and highways

2.The smart buildings discussed in the passage __________．

A．would cause serious financial problems

B．would be worthwhile though costly

C．would increase the complexity of architectural design

D．can reduce the ground vibrations caused by earthquakes

3.It can be inferred from the passage that in minimizing the damage caused by earthquakes attention should be focused on __________．

A．the increasing use of robber and steel in capital construction

B．the development of flexible building materials

C．the reduction of the impact of ground vibrations

D．early forecasts of earthquakes

4.The author's main purpose in writing the passage is to __________．

A．compare the consequences of the earthquakes that occurred in the U．S．

B．encourage civil engineers to make more extensive use of computers

C．outline the history of the development of quake-resistant building materials

D．report new developments in constructing quake- resistant buildings

高三英语阅读理解中等难度题查看答案及解析

We are born to win! The _____ to success is in our genes, say scientists.

A. drive　　　　　　　　　 B. gravity　　　　　　　 C. request　　　　　　　　 D. squeeze

高三英语单项填空中等难度题查看答案及解析

I will never understand how it ______ that you failed in the examination for you are such a good student.

A．came about        B．brought in         C．stayed up         D．ended up

高三英语单项填空中等难度题查看答案及解析

This is the reason ______ she explained in the report for her success in the job.

A．what             B．that              C．how              D．where

高三英语单项填空中等难度题查看答案及解析

The news _____ our team was defeated in the final .

A. which　　　 　　　　　　　　　 B. that　　　　 　　　　　　　　　 C. what　　 D. 不填

高三英语单项填空中等难度题查看答案及解析

Despite such a big difference in ___ towards what one eats,there is no doubt that people in the west regard the Chinese food as something special.

A.point                                     B.idea

C.attitude                                      D.sight

高三英语单项填空中等难度题查看答案及解析