2. 外语
  3. In 1490 or so, the main progress mentioned in this passage was______. Siebe’s invention was not a perfect one, because______.

In 1490 or so, the main progress mentioned in this passage was______. Siebe’s invention was not a perfect one, because______.

admin2009-06-24  155
问题 In 1490 or so, the main progress mentioned in this passage was______.
Siebe’s invention was not a perfect one, because______.
选项 A、too great a supply of air could result in a sudden rise to the surface.
B、a sudden dive into deep water could cause the crushing of the body.
C、the air pipe attached to a machine could be above the surface.
D、both A and B.
答案D
解析
转载请注明原文地址:https://kaotiyun.com/show/wNHd777K
本试题收录于： 公共英语五级笔试题库公共英语（PETS）分类
0

公共英语五级笔试

公共英语（PETS）

相关试题推荐
随机试题
最新回复(0)