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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.
stronger
B.
better
C.
more
D.
longer
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参考答案:
举一反三

【单选题】男性,60岁,咯血200ml后突然窒息,应立即采取的关键措施是

A.
吸氧
B.
输血
C.
静推垂体后叶素
D.
去除呼吸道梗阻
E.
静点呼吸兴奋剂

【单选题】线切割加工利用的能量是( )

A.
光能
B.
化学能
C.
机械能
D.
电能和热能
相关题目:
【单选题】男性,60岁,咯血200ml后突然窒息,应立即采取的关键措施是
A.
吸氧
B.
输血
C.
静推垂体后叶素
D.
去除呼吸道梗阻
E.
静点呼吸兴奋剂
【单选题】线切割加工利用的能量是( )
A.
光能
B.
化学能
C.
机械能
D.
电能和热能
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