______ commutation via the telegraph began in the 1840s, just before the Civil W

游客2025-04-28 5

问题 ______ commutation via the telegraph began in the 1840s, just before the Civil War, and via the telephone just afterward (1870s) .

选项 A、Instantaneous
B、Spontaneous
C、Simultaneous
D、Instinctive

答案 A

解析 “instantaneous”意为“瞬间的，即时的”，“spontaneous”意为“自发的”，“simultaneous”意为“同时发生的”，“instinctive”意为“本能的，天生的”。电报和电话都是即时通讯工具，故正确答案为A。

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______commutationviathetelegraphbeganinthe1840s,justbeforetheCivilW