维生素A缺乏病是以眼、皮肤改变的全身性疾病。( )
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31（）
A. especially Latie
B. for example
C. therefore
D. not American
Questions 14-16 are based on the following passage. You now have 15 seconds to read Questions 14-16. What is not one of the bad effects of malaria
A. The malaria parasites will grow and divide in the kidney.
B. The red blood cells will then be invaded by the parasites which reproduce thousands of times later.
C. The parasites cause a person’ s body temperature to rise.
D. People with malaria may suffer kidney failure or loss of red blood cells.
与食管癌发病有密切关系的是 答案ABCDE
A. 吸烟
B. 黄曲霉素
C. 腌制食品
D. 雄激素水平偏高
E. 雌激素水平偏高
Questions 17-20 are based on the following passage. You now have 15 seconds to read Questions 17-20. Why is the demand for shark fins rising in Asia
A. Because there are fewer sharks in Asia.
Because shark fins can be used for medical purposes and for food.
C. Because shark fins are poisonous.
D. Because shark fins are expensive.
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