制备过程需用醇去杂质，调节溶解的pH值及加抗氧剂( )。 A．0.5%盐酸普鲁卡因

根据所给词的适当形式填空。

1. How ________ (more) salt will you put in the dish? Only a little.

2. Tina__________(buy) some interesting souvenirs for kids on her trip to China.

3. I spent half an hour________ (make) a bottle of delicious apple smoothie. How happy I was.

4. Fifteen minutes is enough for you ________ (cut) up some tomatoes.

5. You need ________ (add) some red sugar to the soup. It's really strong!

6. Why not ________ (turn) off the TV? You have lots of homework to do.

7. Would you like some ________ (butter) on the bread?

8. He worries about ________ (get) there in time, because he doesn't have a bike.

9. It's easy for her ________  (work) out the math problems.

10. ________  (wait) for someone for a long time often makes me feel tired.

慢性腹泻病人，于黎明之前腹中微痛，泻后痛减，舌淡，苔白，脉沉细。针灸时选（）。

A.脾俞、章门、天枢、肾俞、关元

B.神阙、公孙、天枢、肾俞、足三里

C.足三里、三阴交、天枢、上巨虚、下巨虚

D.关元、太冲、天枢、曲池、中渚

E.气海、肝俞、天枢、阴陵泉、曲池

The questions in this group are based on the content of a passage. After reading the passage, choose the best answer to each question. Answer all questions following the passage on the basis of what is stated or implied in the passage.

The complex life cycle of the Plasmodium protozoan, the causative agent of malaria, has contributed to the difficulty of devising effective public health measures to combat the disease. It took scientists centuries to deconstruct the basic relationship between protozoan, mosquito vector, and human host. Modern physiologists and epidemiologists are still working out the intricacies of malarial infection.

The disease is transmitted by the bite of a female Anopheles mosquito infected with the Plasmodium parasite. Only Anopheles mosquitoes are capable of transmitting the disease, and only females take blood meals from humans. To become infected with Plasmodium, the female mosquito takes a blood meal from a human carrying the parasite in his or her blood. Once ingested, the parasite matures in the mosquito’s gut for approximately a week, after which it migrates to the insect’s salivary glands. By mixing with the mosquito’s saliva, the parasite facilitates its transmission to a human host when the mosquito bites that human.

Once in a human’s bloodstream, the parasite travels to the human’s liver. At this initial stage, the Plasmodium parasite is called a sporozoite. Within the liver, the sporozoite can form 30,000 to 40,000 daughter cells, called merozoites, which are released into the host’s bloodstream at a later date, sometimes within a week of the initial infection and sometimes as much as several months later. The merozoites seek out and attach themselves to red blood cells, in which they incubate 8 to 24 daughter cells over the next two days. When the daughter cells are mature, the red blood cell ruptures and the new parasites are released into the bloodstream to seek out red blood cells of their own. Some of the new merozoites become male and female gametocytes; if these gametocytes are ingested by a mosquito feeding on the host’s blood, they will fertilize in the mosquito’s gut to produce new sporozoites, and the cycle will continue.

The symptoms that we associate with malaria--a high, recurring fever; joint pain; a swollen spleen--are caused by toxins released from the red blood cells ruptured by merozoites. The human spleen can destroy these infected blood cells, but the Plasmodium parasite counters this effect by increasing the stickiness of proteins on the blood cells’ surfaces so that the cells stick to the walls of blood vessels. If the sticky surface proteins affect a particularly large number of cells, the malaria can trans-form into a hemorrhagic fever, the most deadly form of malaria.

A further complicating factor in the natural history of malaria is the many variants of the Plasmodium protozoan. Scientists now recognize that malaria is caused by at least six different species: P. falciparum, P. vivax, P. ovale, P. malariae, P. knowesli, and P. semiovale. Of these species, P. falciparum accounts for the majority of infections and approximately 90 percent of malarial deaths in the world.

Which of the following most accurately states the role of the first paragraph in relation to the passage as a whole ？（）

A. It summarizes two theories, the relative merits of which are debated in the passage.

B. It puts forth an argument that the rest of the passage is devoted to refuting.

C. It introduces a new concept that the rest of the passage expands upon.

D. It frames the background and relevance of the material to follow.

E. It outlines the major themes of each of the four paragraphs to follow.

2004年11月，Intel发布64位CPU——Pentium 3.8G，则该CPU的主频为( )。

A．64MHz

B．64GHz

C．3.8MHz

D．3.8GHz

启动PC后，可以最先从显示器屏幕上获得的信息是显示器信息。