upgraded in reliability and safety．,reduced in size and-找考题网

单项选择题

A．upgraded in reliability and safety.
B．reduced in size and number.
C．dismantled partly later this year.
D．maintained in their present conditions.

<上一题目录下一题>

热门试题

单项选择题

单项选择题

您的浏览器不支持 audio 元素。