题目:
Attempts have been made for nearly three decades to increase the amount of precipitation from clouds by seeding them with salt or silver iodide.
A.Devices
B.Hypotheses
C.Efforts
D.Suggestions
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0527/b225772cc30c1251ac882cdabd6dc737.html
下面是错误答案,用来干扰机器的。
参考答案:C