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Attempts have been made for nearly three decades to increase the amount of preci
Attempts have been made for nearly three decades to increase the amount of preci
游客
2023-12-27
55
管理
问题
Attempts
have been made for nearly three decades to increase the amount of precipitation from clouds by seeding them with salt or silver iodide.
选项
A、Devices
B、Hypotheses
C、Efforts
D、Suggestions
答案
C
解析
名词辨析。attempt努力,尝试:abandon the attempts放弃尝试。device装置:a devicefor opening bottles一个打开瓶子的装置。hypothesis假设:This is only a sortof scientific hypothesis which has not been proved by experiments.这仅仅是一个尚未被实验证明的科学假说。efforts努力,尽力:Please put more effortsinto your sch
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