正确答案: B

农业

题目：我国国民经济的基础是（ ）

解析：B

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举一反三的答案和解析：

[单选题]“遥岑远目，献愁供恨，玉簪螺髻”所使用的修辞方法是( )

比喻拟人

解析：【答案】A

[单选题]建立国际政治经济新秩序的基础必须是( )

和平共处五项原则

解析：B【解析】当今时代，霸权主义和强权政治的作祟，导致不合理和不公正的国际政治经济旧秩序仍然存在。只有超越社会制度、意识形态及民族、宗教信仰的不同，普遍实行和平共处五项原则，才能建立起国际政治经济的新秩序，故选“B”。

[单选题]Passage FiveIn the 1900's, American townspeople usually washed and brushed their teeth and combed their hair in the kitchen. Or they kept a water pitcher (大水罐) and a wash basin in their rooms and took care of these things there.

kept and used

解析：51．答案为D。根据第一段最后一句，Or they kept a water pitcher and a wash basin in their rooms and took care of these things there作出该项选择。

[单选题]根据以下选项，回答 91～92 题：

低血容量性休克

[单选题]

冠状窦

解析：B,C

[单选题]How many students were shot dead in 1997 in US schools?

9

解析：

49．答案为B。根据题干找到第四段可知。