根据《中外合资经营企业法实施条例》，下列事项中哪些必须由出席董事会会议的董事一致通过方可作出决议？

A、Contact with the host during feeding and leave the host later so as to pass on the disease by feeding

B、Can live by themselves and invade the host by chance

C、often cause latent infection in the host , and occasionally cause disease

D、result in latent infection in the normal hosts, and cause disease in immunecompromised hosts

A、liver damage

B、heart disease

C、pneumonia

D、bad influenza

A、chronic gastritis

B、acute gastritis

C、gastric carcinoma

D、chronic gastric ulcer

A．pancreatitis

B．cholelithiasis

C．hepatitisA

D．cirrhosis

From the passage, we can know that ______.

A．chronic disease is the leading cause of death only in wealthy countries

B．chronic disease has developed alongside the country's economy

C．chronic disease is not the leading cause of death in China

D．more deaths occurred from the top three chronic diseases in cities than in rural areas in China

Hepatitis (肝炎) means "inflammation (发火) of the liver", and its

most common cause is infected with one of 5 viruses, called hepatitis 【S1】______

A, B, C, D, and E. All of these viruses can cause an acute disease with

symptoms lasting several weeks including yellowing of the skin and

eyes, dark urine, extreme fatigue, vomiting and abdominal pain. It can

take several months for a year to feel fit again. 【S2】______

Hepatitis C (HCV) is the most prevalent liver disease in the world.

The World Health Organization consider Hepatitis C an epidemic. 【S3】______

Because Hepatitis C can infect a patient for decades after being 【S4】______

discovered, it is often called the "silent" epidemic. According to the

Center for Disease Control (CDC), 20-30% of people with chronic

Hepatitis C will eventually face life-threatened symptoms. 【S5】______

Currently, it is estimated there are about 270 to 300 million people

worldwide who are infected with HCV, 4 million of who are in the 【S6】______

United States. The prevalence seems to be high in Eastern Europe than 【S7】______

in Western Europe. In industrialized countries, HCV accounts of 20% 【S8】______

of cases of acute hepatitis, 70% of cases of chronic hepatitis, 40%

of cases of end-stage cirrhosis (硬化), 60% of cases of liver cancer

and 30-40% of liver transplants. The incidence of new symptomatic

infections of HCV have been estimated to be 13 cases out of 100,000 【S9】______

people annually. For every one person that is infected with the AIDS

virus, there are more than four infected with HCV. The CDC (Center

for Disease Control) estimates that there arc up to 26,000 new HCV

infections in the U.S. every year, and for that Hepatitis C causes 10,000 【S10】______

to 12,000 deaths each year.

【S1】

A、inhibition of HIV-1 disease progression by concomitant HIV-2 infection

B、effects of concomitant HIV-2 infection on HIV-1 disease progression

C、relationship between concomitant HIV-2 infection and HIV-1 disease progression

D、/

A、Obesity is the necessary cause of hypertension.

B、HIV infection is the necessary cause of AIDS.

C、The propability of a disease by a necessary cause is over 95%.

D、The propability of disease by a necessary cause is less than 5%.

A．brain

B．. heart

C．liver

D．kidney

A．Viral infection

B．obesity

C．alcohol

D．drug