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Tóm tắt Đề thi ViOlympic Tiếng Anh Lớp 12 - Đề thi số 113
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Đọc đoạn văn sau và trả lời các câu hỏi:
Vibrio parahaemolyticus is a bacteria that has been isolated from sea water, shell fish, finfish, plankton and salt springs. It has been a major cause of food poisoning in Japan and the Japanese have done several studies on it. They have confirmed the presence of V. 5 parahaemolyticus in the north and central Pacific with the highest abundance in inshore waters, particularly in or near large harbors.
A man named Nishil studied the relationship between the chloride content of sea water and the seasonal distribution of V. parahaemolyticus 10 and concluded that while the isolation of V. parahaemolyticus was independent of the sodium chloride content, the distribution of V. parahaevolyticus in sea water was dependent on the water temperature. In fact it has been isolated in high frequencies during summer, from June to September, but was not isolated with the same frequency in 15 winter.
Within four of five days after eating contaminated foods, a person will begin to experience diarrhea, the most common symptom: this will very often be accompanied by stomach cramps, nausea, and vomiting. 20 Headache and fever, with or without chills, may also be experienced.
1. Which of the following locations would be most likely to have a high concentration of Vibrio parahaemolyticus?
(A) a bay
(B) a sea
(C) the middle of the ocean
2. The safest time for eating seafood is probably
3. The most common symptom of V. parahaemolyticus is
(D) headache and fever
4. The incubation period for this illness is
(A) 2 to 3 days
(B) 3 to 4 hours
(C) 4 to 5 days
(D) several months
5. Nishil's study showed that
(A) the presence of V. parahaemolyticus was dependent on neither the salt content nor the water temperature
(B) the presence of V. parahaemolyticus was dependent on only the salt content
(C) the presence of V. parahaemolyticus was independent of both he water temperature and the salt content
(D) the presence of V. parahaemolyticus was dependent on the water temperature
6. The word "cramp" in line 19 means most nearly
(C) severe pain
(D) high temperature
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