China has got a good_________ for fighting ag...

China has got a good_________ for fighting against Covid-19 with its careful and smooth organizaton.

A.reputation B.influence C.impression D.knowledge

高二英语单项填空简单题查看答案及解析

China has got a good 　　 for fighting against the flu with its careful and smooth organization.

A.reputation　　　 B.influence

C.impression　　　　 D.knowledge

高二英语单项填空简单题查看答案及解析

China has got a good ___ for fighting against the flu with its careful and smooth organization

A.reputation    B.influence    C.impression       D.knowledge

高二英语单项填空中等难度题查看答案及解析

China has got a good ________ for fighting against the flu with its careful and smooth organization.

A．reputation　     B．influence　　　　　　 C．impression　     D．knowledge

高二英语单项填空简单题查看答案及解析

China has got a good ________ for fighting against the flu with its careful and smooth organization.

A．reputation  B．influence

C．impression  D．knowledge

高二英语简单题查看答案及解析

China has got a good _________ for fighting against the flu with its careful and smooth organization．

A．reputation　　　　　　　　 B．influence

C．impression　　　　　　　　 D．knowledge

高二英语单项填空中等难度题查看答案及解析

China has a good ________ for fighting against the flu with its careful and smooth organization.

A. reputation     B. influence       C. impression       D. knowledge

高二英语单项填空中等难度题查看答案及解析

14 days. That’s the time Chinese scientists took to identify the full genetic sequence of the novel coronavirus (新冠病毒) since its outbreak. It was shared with the WHO immediately, and has now become an important foundation for global researchers in the fight against the COVID-19. But first, let us turn the clock back 17 years, when it took months to identify the SARS virus. From months to 14 days, what changed? It turns out AI played an important part.

The scientists first obtained bronchoalveolar lavage (BAL) fluid (支气管扩张灌洗液) samples from patients, isolated (分离) the DNA and RNA, then sequenced the genetic material by comparing them. AI’s advantage is its ability to recognize patterns among a flood of data.

Let me put it in a simple way. Sequencing the coronavirus genome (基因组) is similar to looking for a needle in a haystack (干草堆)---looking for genotypes (基因型) with specific characteristics from a huge gene pool. That’s where search algorithm (算法), a branch of modern AI, comes in. Think of it as an efficient search engine, which can find the needle in the haystack. This search algorithm can shorten months-long genetic sequencing to weeks or even just a few days. Combined with macro-genomic sequencing and a virus library, this AI technology can also be used in tracking virus mutation (突变).

AI doesn’t just support scientists. It can also help patients by improving the efficiency of diagnosis (诊断). China launched a Genomics Service, which can run multiple virus gene comparisons and produce a detailed report within 60 seconds. This algorithm has been put into use in China and shared to the world for free.

1.AI’s advantage is that it can ________.

A.slow down the spread of coronavirus B.separate DNA from RNA

C.identify specific genotypes rapidly D.obtain samples from patients quickly

2.The search algorithm helps shorten the time of genetic sequencing by __________.

A.finding a needle in a haystack B.serving as a search engine

C.combining with a virus library D.tracing virus mutation

3.What do we know about the Genomics Service in the last paragraph?

A.It has been widely used in the world. B.It is mainly based on blood test.

C.It is for fast diagnosis of COVID-19. D.It is used to track COVID-19 patients.

4.What’s the best title of the passage?

A.14 Days---China Made it! B.AI Assists in COVID-19 Fight

C.Search Algorithm, Best Choice D.China’s Genomics Service

高二英语阅读选择中等难度题查看答案及解析

The 3D-printing industry is accelerating its efforts to help fight the new coronavirus and the disease it causes, COVID-19.

On Tuesday, HP announced it’s working with those who bought its 3D printers to make medical face shields, hands-free door openers and an adjuster for face masks for medical staff who often must wear them for hours. It’s also testing “hospital-grade” face masks meeting the higher-end FFP3 (过滤式面罩) standard and parts for simple emergency ventilators (呼吸机) and it’s looking into nasal swabs to test for COVID-19 infection. HP also is offering free downloads of its 3D-printed medical equipment designs.

Carbon, whose 3D printers are used to make everything from bicycle seats to teeth straighteners, said it plans to send face shield designs to its network of customers who’ve bought its 3D printers. Carbon co-founder and Executive Chairman Joseph DeSimone said on Monday the company expects to send the designs by early Tuesday.

3D-printcr makers typically sell their products to others that actually do the 3D printing. One such customer, Ford, said Tuesday that it’s made 1,000 face shields and shipped them to Michigan hospitals, with plans to make 100,000 face shields a week. It is also working with 3M and General Electric on respirator masks and ventilator designs.

The effort is one of several to apply 3D-printing technology to the fight against coronavirus. 3D printing isn’t as fast at churning out products as conventional mass production methods. But 3D printers are flexible and able to make many different parts anywhere there’s a printer and raw materials like the plastic resins Carbon printers use.

Some 3D-printing efforts have focused on ventilators, which expected to be in short supply with a surge of COVID-19 patients suffering from respiratory (呼吸器官) problems. Also in short supply arc N95 masks that can be useful in reducing the likelihood a wearer will spread COVID-19 to others.

Carbon’s DeSimone is cautious about the enthusiasm, though, saying that regulatory approval is important and that 3D-printcr enthusiasts shouldn’t be making components not intended for close human contact that might release unhealthy gases.

1.What is the passage mainly about?

A.An introduction about 3D-printing.

B.The 3D-printing industry’s efforts to help fight COVID-19.

C.The products that 3D-printing makers sell.

D.How 3D-printing makers produce medical equipment.

2.HP announced to help its customers to make the following products except for_____________.

A.medical face shields B.hands-free door openers

C.an adjuster for face masks D.emergency ventilators

3.Which of the following is true according to the passage?

A.Carbon’s company will finish its design after Tuesday.

B.Ford has made 1,000 face shields end plans to make 10,000 more in a week.

C.3D printers are more flexible than traditional mass production methods.

D.Most 3D-printings focus on making ventilators and N95 because of their short supply.

4.What can be inferred from the last paragraph?

A.3D-printing may release unhealthy gases.

B.DeSimone is cautious about 3D-printing.

C.Carbon’s company didn’t gain regulatory approval of making medical equipment.

D.3D printers aren’t enthusiastic about making components designed for close human contact.

高二英语阅读选择中等难度题查看答案及解析

Lessons learned in past outbreaks

The novel coronavirus dominates(主导）the headlines as one of the world's most pressing issues.It has killed more people than the 2003 SARS outbreak,according to the World Health Organization（WHO).1.?

One of the biggest lessons from SARS was to share the latest information about the virus with the public and other countries in the world as quickly as possible.,2.,allowing scientists around the world to start developing a vaccine(疫亩）on Jan 12,according to Xinhua.

With experiences of fighting against SARS and MERS,many countries were also better prepared to stop the spread of coronavirus.3..During the 2012 MERS outbreak,research showed that infected camels caused the outbreak.According to the WHO,strict measures were enacted(实施）， restricting the sale of camels and camel products in the Arabian Peninsula.There were also mass health tests for all those in close contact with diseased animals.4.

In the fight against the novel coronavirus,China has also taken many effective measures to control the virus.Under the leadership and command of the central government,all provinces and municipalities(自治区）across the country have launched a Level One emergency response to the novel coronavirus.5..It is because of these effective measures that the epidemic has been constrained （限制）successfully within China,with the confirmed cases less than many other countries.

A.They also quickly isolated(隔离）those who were confirmed infected for medical care

B.Chinese health officials published the details of the new virus online

C.The number of infections overall in China are now far more than that of SARA

D.Following the measures,the number of the infected has dramatically decreased

E.The outbreak has killed many people since the first death was reported in Wuhan

F.But there is no better prevention than stopping the source

G.What can we learn from the past outbreaks,including SARS and MERS

高二英语七选五中等难度题查看答案及解析