______ have been made for nearly three decades to increase the amount of precipi

游客2023-12-27 74

问题 ______ 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、Attempts
D、Commissions

答案 C

解析名词辨析A Devices装置，设计，策略，设备；B．Hypotheses臆测，假定；C．Attempts努力，尝试，企图；D．Commissions委任，代办(权)，佣金；本题讲的是：已做了近三十年的尝试，试图在云层中加入盐或碘化银来增加降雨量；因此C为答案。

转载请注明原文地址:https://www.tihaiku.com/zcyy/3310177.html

相关试题推荐

随机试题

最新回复(0)

InnearlyeverycasethefirstblackBritonstomovetotheUKdidsooftheiro