2. 外语
  3. ______commutation via the telegraph began in the 1840s, just before the Civil War, and via flic telephone just afterward(1870s).

______commutation via the telegraph began in the 1840s, just before the Civil War, and via flic telephone just afterward(1870s).

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问题 ______commutation via the telegraph began in the 1840s, just before the Civil War, and via flic telephone just afterward(1870s). (2009年北京大学考博试题)
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的通信工具，故正确答案为A。
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