[单项选择]由我国信息产业部批准发布，在信息产业部门范围内统一使用的标准，称为 (36) 。由政府或国家级的机构制定或批准的标准称为国家标准， (37) 标准不属于国家标准。

A. GB
B. BS
C. ANSI
D. IEEE

Traditionally, the American farmer has always been independent
and hard-working. In the eighteenth century farmers were quite
self-efficient. The farm family grew and made almost nothing it 1. ______
needed. The surplus crop would be sold in order to buy a few items in
the local general store.
In 1860, because some of the farm population had moved to the 2. ______
city, yet eighty percent of the American population was still in the
country. In the late nineteen century, farm work and life were not much 3. ______
changed from that they had been in old days. The banner arose at dawn 4. ______
or before and had much work to do, with his own muscles like his 5. ______
chief source of power. He used aces, spades and other complicated 6. ______
tools. In his house cook was done in wood-burning stoves, and the 7. ______
kerosene lamp was the