2. 外语
  3. According to the passage, people started to make glass ______. According to the passage the new telephone communication system

According to the passage, people started to make glass ______. According to the passage the new telephone communication system

admin2009-03-15  92
问题 According to the passage, people started to make glass ______.
According to the passage the new telephone communication system ______.
选项 A、has been put into actual use
B、was put into actual use in 1977
C、was put on experiment in 1977
D、had been repeatedly experimented on before 1977
答案C
解析 第三段第一句……，the new system was used successfully in an experiment in Chicago in 1977．答案选C。
转载请注明原文地址:https://kaotiyun.com/show/gU8d777K
本试题收录于： 公共英语二级笔试题库公共英语（PETS）分类
0

公共英语二级笔试

公共英语（PETS）

相关试题推荐
随机试题
最新回复(0)