2. 外语
  3. People did not begin to use unmanned vehicles in undersea exploration until recently because of______. The sonar devices must b

People did not begin to use unmanned vehicles in undersea exploration until recently because of______. The sonar devices must b

admin2012-09-10  37
问题 People did not begin to use unmanned vehicles in undersea exploration until recently because of______.
The sonar devices must be placed ______.
选项 A、from time to time
B、after the undersea vehicle dives
C、at the time when the undersea vehicle is diving
D、before the undersea vehicle dives
答案D
解析 参见第五段最后一句，in advance与本题的正确选项相关。
转载请注明原文地址:https://kaotiyun.com/show/uqLd777K
本试题收录于： 职称英语理工类A级题库职称英语分类
0

职称英语理工类A级

职称英语

相关试题推荐
随机试题
最新回复(0)