2. 外语
  3. Laser-dopple radar ______. Laser-dopple radar is especially valuable in space missions because it ______.

Laser-dopple radar ______. Laser-dopple radar is especially valuable in space missions because it ______.

admin2009-01-15  68
问题 Laser-dopple radar ______.
Laser-dopple radar is especially valuable in space missions because it ______.
选项 A、is one thousand times more precise than microwave radar
B、provides precise measures of the velocity of space vehicles
C、is a new system of radar
D、can measure the movement of a spaceship less accurately than a microwave radar
答案B
解析 ．laser-dopple radar，can measure with absolute precision．．．such fine measures of velocity are of prime importance．
转载请注明原文地址:https://kaotiyun.com/show/6JAd777K
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)