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【单选题】

Directions: There are 20 blanks in the following passage. For each blank there are four choices marked A, B, C and D at the end of the passage. You should choose the ONE that best fits the passage. Then mark the corresponding letter on the Answer Sheet.
The first man who cooked his food, instead of eating it raw, lived so long ago that we have no idea who he was or where he lived. We do know, however, that (41) thousands of years food was always eaten cold and (42) . Perhaps the cooked food was heated accidentally by a (43) fire or by the melted lava from an erupting (44) . When people first tasted food that had been cooked, they found it tasted better. However, (45) after this discovery, cooked food must have remained a rarity (46) man learned how to make and light (47) .
Primitive men who lived in hot regions could depend on the heat of the sun (48) their food. For example, in the desert (49) of the southwestern United States, the Indians cooked their food by (50) it on a flat (51) in the hot sun. They cooked piece of meat and thin cakes of corn meal in this (52) . We surmise that the earliest kitchen (53) was a stick (54) which a piece of meat could be attached and held over a fire. Later this stick was (55) by an iron rod or spit which could be turned frequently to cook the meat (56) all sides.
Cooking food in water was (57) before man teamed to make water containers that could not be (58) by fire.
The (59) cooking pots were reed or grass baskets in which soups and stews could be cooked. As early as 166 B. C., the Egyptians had learned to make (60) . permanent cooking pots out of sand stone. Many years later, the Eskimos learned to make similar pans.

A.
supported
B.
replaced
C.
changed
D.
switched
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参考解析:
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【单选题】In 1972, a century after the first national park in the United States was established at Yellowstone, legislation was passed to create the National Marine Sanctuaries Program. The intent of this legis...

A.
the discovery of several new marine organisms
B.
the preservation of connections between individual marine species
C.
the protection of coastal habitats
D.
the establishment of areas where the public can observe marine life

【单选题】某患者在应用异烟肼、链霉素治疗中出现耳鸣、重听,痰菌阳性,你认为治疗方案应改为

A.
异烟肼、利福平
B.
异烟肼、利福平、卡那霉素
C.
利福平、乙胺丁醇
D.
卷曲霉素、氨硫脲
E.
卷曲霉素、异烟肼