Some of the earliest mechanical devices were designed to raise water from streams for the irrigate of crops.() A: earliest mechanical B: were designed C: raise D: irrigate

Mud from the bottom of the pond can be used to ________ the crops. A: sow B: irrigate C: fertilize D: weed

The Yangtze river [u]irrigate[/u] [u]one[/u] [u]five[/u] of China's land. 未知类型：{'label': 'questionDesc', 'content': '找出下列句子中不正确的部分。', 'isMemberControl': 0, 'type': 181} 未知类型：{'label': 'source', 'content': '2017年6月 四级 卷一 翻译', 'isMemberControl': 0, 'type': 181} A: irrigate B: one C: five

The first paragraph mainly talks about ______. A: the problems caused by river water B: the necessity to irrigate the field C: the water shortage in some countries D: the canals carrying water to fields