试题与答案

世界上第一台电子数字计算机ENIAC是1946年研制成功的,其诞生的国家是_____

题型:单项选择题

题目:

世界上第一台电子数字计算机ENIAC是1946年研制成功的,其诞生的国家是______。

A) 美国
B) 英国
C) 法国
D) 瑞士

答案:

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题型:阅读理解

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B. any book

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D. An encyclopedia (百科全书)

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题型:填空题

(14分)

一切植物中均含有天然有机高分子化合物A,它是构成植物细胞壁的基础物质,不溶于水,也不溶于一般有机溶剂.能发生如下变化(A~F均分别代表一种物质,框图中的部分产物已略去,如:B生成C的同时还有CO2生成.)

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